Gut Microbiome: What's your gut telling you lately?

Commonly suggested options include kefir, multi-strain Probiotic (50B CFU), synbiotic Supplementation, fiber Deficiency, ST25 (Tianshu) - Stomach 25 and psyllium Husk.

Gut Microbiome: How would you rather support your gut?

Commonly suggested options include kefir, green Tea (EGCG), inulin, fiber Deficiency, psyllium Husk and prebiotics.

Gut Microbiome: natural remedies and the evidence behind them

Your gut microbiome is the vast community of bacteria and microorganisms living in your digestive tract, influencing digestion, immunity, mood, and overall…

15 options · 3 graded B · 3 graded C · 9 traditional or ungraded

What's your gut telling you lately?

Bloating, gas, or irregular bathroom trips are bugging me right now

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Multi-strain Probiotic (50B CFU)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
May help rebalance gut bacteria
Why this matches
If you're dealing with bloating or irregularity, a multi-strain probiotic delivers a concentrated, consistent dose of beneficial bacteria to help rebalance the gut environment.
Why try it
In a randomized trial in adults taking metformin, this multi-strain probiotic was shown to shift gut microbiome composition and bile-acid pathways. That microbiome-rebalancing action is why it's relevant here; it has not been tested as a general digestive-function treatment.
Dose or use
50 billion CFU daily with food, as directed on product labeling.
Time to results
Typically 2–6 weeks
Key study
RCT (2026, PMID 41985330): a post-hoc multi-omics analysis of the ProGasMet trial found that, in metformin-treated adults studied for GI tolerability, the multi-strain probiotic modulated gut microbiome composition and bile-acid pathways.
Caution
Those who are immunocompromised should consult a healthcare practitioner before use.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
ST25 (Tianshu) - Stomach 25
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Abdominal point for bloating and irregularity
Why this matches
For bloating, gas or irregularity, ST25 sits right on the abdomen and is traditionally pressed to ease constipation, diarrhoea and IBS-type discomfort.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine as the abdominal Stomach-meridian point for digestive complaints such as constipation, diarrhoea, bloating and gas.
Dose or use
Press firmly for 1–2 minutes on each side, about two finger-widths either side of the navel, 1–2x daily.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if you are pregnant or have abdominal pain of unknown cause; ease off if it feels uncomfortable.
Psyllium Husk
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Prebiotic fibre feeds beneficial gut bacteria
Why this matches
If irregularity is a key complaint, psyllium husk adds bulk and acts as a prebiotic substrate to nourish microbiome diversity.
Why try it
Traditionally used to support bowel regularity and gut health by providing soluble fibre that beneficial gut bacteria ferment and thrive on.
Dose or use
5–10 g (1–2 teaspoons) mixed into a full glass of water, once daily.
Time to results
Typically 1–2 weeks for regularity
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Always take with plenty of water; may slow absorption of medications if taken together — space by at least 2 hours.

I feel okay and want to build a resilient, diverse gut for the long haul

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Prebiotics
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Feeds the good bacteria already in your gut
Why this matches
Since you want to build gut health for the long haul, prebiotics give the beneficial bacteria you already have the fuel they need to grow and diversify.
Why try it
Prebiotics are non-digestible fibres that selectively feed beneficial gut bacteria. A meta-analysis of randomised trials found prebiotic supplementation significantly raised Bifidobacteria levels, making them a well-evidenced, foundational way to nourish a diverse microbiome. The pooled trials were largely in older adults, so the size of the effect at other ages is less certain.
Dose or use
Follow product labeling; typically around 3–5 g daily, increased gradually to reduce gas.
Time to results
Typically 2–4 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — pooling 29 randomised trials, prebiotic supplementation significantly increased beneficial Bifidobacteria (SMD 1.09).
Caution
May cause temporary bloating or gas; increase the dose slowly and ease off if uncomfortable, especially if you have IBS.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.
Inulin
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Prebiotic fibre that fuels a diverse microbiome
Why this matches
For a long-term approach, inulin is a well-characterised prebiotic fibre that feeds friendly gut bacteria and gently supports regularity.
Why try it
Inulin is a soluble prebiotic fibre found naturally in many plants; it ferments in the colon to nourish beneficial bacteria and encourage a healthier microbial balance.
Dose or use
Start at 3–5 g daily with water and build up gradually to around 10 g as tolerated.
Time to results
Typically 2–4 weeks
Key study
Ungraded here: inulin is widely described as a prebiotic fibre that supports gut bacteria, but this specific use is not backed by a controlled clinical trial cited in the library.
Caution
Can cause gas or bloating, particularly at higher doses or if you have IBS; increase the amount slowly.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
Magnesium
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Foundational mineral supporting gut motility long-term
Why this matches
For a proactive approach, magnesium is traditionally used to support smooth gut motility and a relaxed nervous system, both of which underpin a thriving microbiome over time.
Why try it
Traditionally used to promote healthy bowel regularity and reduce gut tension; adequate magnesium supports the parasympathetic 'rest-and-digest' state that allows the microbiome to flourish.
Dose or use
200–400 mg elemental magnesium (glycinate or citrate forms) daily in the evening.
Time to results
Typically 2–6 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High doses can cause loose stools; reduce dose if this occurs. Consult a practitioner if you have kidney disease.

I'm run-down and catch every bug — my gut defenses feel off

Berberine
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Plant alkaloid shown in trials to reshape gut flora
Why this matches
If your gut flora feels out of balance, berberine has human-trial evidence for reshaping the microbiome, which is why it's worth considering here.
Why try it
A systematic review of seven randomised human trials found berberine, an isoquinoline plant alkaloid, meaningfully shifted gut microbiota composition in most studies. The trials were mostly in people with metabolic or other health conditions, so its effect in an already-healthy gut is less certain.
Dose or use
Commonly 500 mg two to three times daily with meals; start at the lower end and consult a healthcare practitioner first.
Time to results
Typically 4–8 weeks
Key study
Systematic review of RCTs (2026, PMID 42356246): The Integrative Role of Berberine in Gut Microbiota Modulation and Cardiometabolic Outcomes: A Systematic Review of Randomised Clinical Trials — across seven human randomised trials, six found berberine significantly shifted gut microbiota composition.
Caution
May interact with medications including antibiotics and blood sugar-lowering drugs; avoid in pregnancy.
Vitamin D
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Deficiency check — low D affects gut immunity
Why this matches
If you're run-down and getting sick often, checking your vitamin D status matters — if you're low, correcting it can support the immune–microbiome axis.
Why try it
Traditionally used to support immune regulation; vitamin D receptors are expressed throughout the gut lining, and adequate levels are associated with healthier microbial balance.
Dose or use
1,000–2,000 IU daily with a meal containing fat; test levels with your practitioner to personalise the dose.
Time to results
Typically 6–12 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High-dose supplementation should be guided by blood testing; consult a practitioner if you have kidney disease.
Zinc
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Supports gut lining integrity and immunity
Why this matches
For those whose immunity feels compromised, zinc is traditionally used to support the gut mucosal barrier and the immune defences that begin there.
Why try it
Traditionally used to reinforce intestinal barrier function and immune cell activity, both of which are closely tied to a healthy gut microbiome.
Dose or use
8–15 mg of elemental zinc daily with food; consult a healthcare practitioner before longer-term use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Long-term high-dose use can deplete copper; do not exceed 40 mg daily without guidance.

I'm stressed and sleeping badly, and my gut feels every bit of it

Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Ashwagandha
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Adaptogen calming the stress–gut axis
Why this matches
For those whose stress and poor sleep are visibly affecting their gut, ashwagandha is traditionally used to modulate the stress response that drives gut dysbiosis.
Why try it
Traditionally used as an adaptogenic herb to help the body manage stress hormones, which in turn can reduce stress-related disruption to the gut microbiome.
Dose or use
300–600 mg of a standardised root extract daily; consult a healthcare practitioner before use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid in pregnancy; may interact with thyroid and immunosuppressant medications; consult your practitioner if you have autoimmune conditions.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

How would you rather support your gut?

I'd rather fix it through food and everyday diet

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Inulin
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Prebiotic fibre that fuels a diverse microbiome
Why this matches
For a long-term approach, inulin is a well-characterised prebiotic fibre that feeds friendly gut bacteria and gently supports regularity.
Why try it
Inulin is a soluble prebiotic fibre found naturally in many plants; it ferments in the colon to nourish beneficial bacteria and encourage a healthier microbial balance.
Dose or use
Start at 3–5 g daily with water and build up gradually to around 10 g as tolerated.
Time to results
Typically 2–4 weeks
Key study
Ungraded here: inulin is widely described as a prebiotic fibre that supports gut bacteria, but this specific use is not backed by a controlled clinical trial cited in the library.
Caution
Can cause gas or bloating, particularly at higher doses or if you have IBS; increase the amount slowly.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
Psyllium Husk
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Prebiotic fibre feeds beneficial gut bacteria
Why this matches
If irregularity is a key complaint, psyllium husk adds bulk and acts as a prebiotic substrate to nourish microbiome diversity.
Why try it
Traditionally used to support bowel regularity and gut health by providing soluble fibre that beneficial gut bacteria ferment and thrive on.
Dose or use
5–10 g (1–2 teaspoons) mixed into a full glass of water, once daily.
Time to results
Typically 1–2 weeks for regularity
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Always take with plenty of water; may slow absorption of medications if taken together — space by at least 2 hours.

I'd try probiotics or prebiotics to rebalance my gut bacteria

Prebiotics
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Feeds the good bacteria already in your gut
Why this matches
Since you want to build gut health for the long haul, prebiotics give the beneficial bacteria you already have the fuel they need to grow and diversify.
Why try it
Prebiotics are non-digestible fibres that selectively feed beneficial gut bacteria. A meta-analysis of randomised trials found prebiotic supplementation significantly raised Bifidobacteria levels, making them a well-evidenced, foundational way to nourish a diverse microbiome. The pooled trials were largely in older adults, so the size of the effect at other ages is less certain.
Dose or use
Follow product labeling; typically around 3–5 g daily, increased gradually to reduce gas.
Time to results
Typically 2–4 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — pooling 29 randomised trials, prebiotic supplementation significantly increased beneficial Bifidobacteria (SMD 1.09).
Caution
May cause temporary bloating or gas; increase the dose slowly and ease off if uncomfortable, especially if you have IBS.
Berberine
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Plant alkaloid shown in trials to reshape gut flora
Why this matches
If your gut flora feels out of balance, berberine has human-trial evidence for reshaping the microbiome, which is why it's worth considering here.
Why try it
A systematic review of seven randomised human trials found berberine, an isoquinoline plant alkaloid, meaningfully shifted gut microbiota composition in most studies. The trials were mostly in people with metabolic or other health conditions, so its effect in an already-healthy gut is less certain.
Dose or use
Commonly 500 mg two to three times daily with meals; start at the lower end and consult a healthcare practitioner first.
Time to results
Typically 4–8 weeks
Key study
Systematic review of RCTs (2026, PMID 42356246): The Integrative Role of Berberine in Gut Microbiota Modulation and Cardiometabolic Outcomes: A Systematic Review of Randomised Clinical Trials — across seven human randomised trials, six found berberine significantly shifted gut microbiota composition.
Caution
May interact with medications including antibiotics and blood sugar-lowering drugs; avoid in pregnancy.
Multi-strain Probiotic (50B CFU)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
May help rebalance gut bacteria
Why this matches
If you're dealing with bloating or irregularity, a multi-strain probiotic delivers a concentrated, consistent dose of beneficial bacteria to help rebalance the gut environment.
Why try it
In a randomized trial in adults taking metformin, this multi-strain probiotic was shown to shift gut microbiome composition and bile-acid pathways. That microbiome-rebalancing action is why it's relevant here; it has not been tested as a general digestive-function treatment.
Dose or use
50 billion CFU daily with food, as directed on product labeling.
Time to results
Typically 2–6 weeks
Key study
RCT (2026, PMID 41985330): a post-hoc multi-omics analysis of the ProGasMet trial found that, in metformin-treated adults studied for GI tolerability, the multi-strain probiotic modulated gut microbiome composition and bile-acid pathways.
Caution
Those who are immunocompromised should consult a healthcare practitioner before use.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.

I want to calm the stress-gut connection with mind-body support

Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Ashwagandha
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Adaptogen calming the stress–gut axis
Why this matches
For those whose stress and poor sleep are visibly affecting their gut, ashwagandha is traditionally used to modulate the stress response that drives gut dysbiosis.
Why try it
Traditionally used as an adaptogenic herb to help the body manage stress hormones, which in turn can reduce stress-related disruption to the gut microbiome.
Dose or use
300–600 mg of a standardised root extract daily; consult a healthcare practitioner before use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid in pregnancy; may interact with thyroid and immunosuppressant medications; consult your practitioner if you have autoimmune conditions.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

I'd start with foundational vitamins and minerals my gut relies on

Magnesium
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Foundational mineral supporting gut motility long-term
Why this matches
For a proactive approach, magnesium is traditionally used to support smooth gut motility and a relaxed nervous system, both of which underpin a thriving microbiome over time.
Why try it
Traditionally used to promote healthy bowel regularity and reduce gut tension; adequate magnesium supports the parasympathetic 'rest-and-digest' state that allows the microbiome to flourish.
Dose or use
200–400 mg elemental magnesium (glycinate or citrate forms) daily in the evening.
Time to results
Typically 2–6 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High doses can cause loose stools; reduce dose if this occurs. Consult a practitioner if you have kidney disease.
Vitamin D
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Deficiency check — low D affects gut immunity
Why this matches
If you're run-down and getting sick often, checking your vitamin D status matters — if you're low, correcting it can support the immune–microbiome axis.
Why try it
Traditionally used to support immune regulation; vitamin D receptors are expressed throughout the gut lining, and adequate levels are associated with healthier microbial balance.
Dose or use
1,000–2,000 IU daily with a meal containing fat; test levels with your practitioner to personalise the dose.
Time to results
Typically 6–12 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High-dose supplementation should be guided by blood testing; consult a practitioner if you have kidney disease.
Zinc
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Supports gut lining integrity and immunity
Why this matches
For those whose immunity feels compromised, zinc is traditionally used to support the gut mucosal barrier and the immune defences that begin there.
Why try it
Traditionally used to reinforce intestinal barrier function and immune cell activity, both of which are closely tied to a healthy gut microbiome.
Dose or use
8–15 mg of elemental zinc daily with food; consult a healthcare practitioner before longer-term use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Long-term high-dose use can deplete copper; do not exceed 40 mg daily without guidance.

I'm open to hands-on acupressure points I can press myself

ST25 (Tianshu) - Stomach 25
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Abdominal point for bloating and irregularity
Why this matches
For bloating, gas or irregularity, ST25 sits right on the abdomen and is traditionally pressed to ease constipation, diarrhoea and IBS-type discomfort.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine as the abdominal Stomach-meridian point for digestive complaints such as constipation, diarrhoea, bloating and gas.
Dose or use
Press firmly for 1–2 minutes on each side, about two finger-widths either side of the navel, 1–2x daily.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if you are pregnant or have abdominal pain of unknown cause; ease off if it feels uncomfortable.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

Evidence grades describe the strength of published research for Gut Microbiome, not a promise of results. Nothing here is medical advice — talk to your clinician before starting anything, especially alongside prescription medication.

What's your gut telling you lately?

Bloating, gas, or irregular bathroom trips are bugging me right now

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Multi-strain Probiotic (50B CFU)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
May help rebalance gut bacteria
Why this matches
If you're dealing with bloating or irregularity, a multi-strain probiotic delivers a concentrated, consistent dose of beneficial bacteria to help rebalance the gut environment.
Why try it
In a randomized trial in adults taking metformin, this multi-strain probiotic was shown to shift gut microbiome composition and bile-acid pathways. That microbiome-rebalancing action is why it's relevant here; it has not been tested as a general digestive-function treatment.
Dose or use
50 billion CFU daily with food, as directed on product labeling.
Time to results
Typically 2–6 weeks
Key study
RCT (2026, PMID 41985330): a post-hoc multi-omics analysis of the ProGasMet trial found that, in metformin-treated adults studied for GI tolerability, the multi-strain probiotic modulated gut microbiome composition and bile-acid pathways.
Caution
Those who are immunocompromised should consult a healthcare practitioner before use.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
ST25 (Tianshu) - Stomach 25
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Abdominal point for bloating and irregularity
Why this matches
For bloating, gas or irregularity, ST25 sits right on the abdomen and is traditionally pressed to ease constipation, diarrhoea and IBS-type discomfort.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine as the abdominal Stomach-meridian point for digestive complaints such as constipation, diarrhoea, bloating and gas.
Dose or use
Press firmly for 1–2 minutes on each side, about two finger-widths either side of the navel, 1–2x daily.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if you are pregnant or have abdominal pain of unknown cause; ease off if it feels uncomfortable.
Psyllium Husk
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Prebiotic fibre feeds beneficial gut bacteria
Why this matches
If irregularity is a key complaint, psyllium husk adds bulk and acts as a prebiotic substrate to nourish microbiome diversity.
Why try it
Traditionally used to support bowel regularity and gut health by providing soluble fibre that beneficial gut bacteria ferment and thrive on.
Dose or use
5–10 g (1–2 teaspoons) mixed into a full glass of water, once daily.
Time to results
Typically 1–2 weeks for regularity
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Always take with plenty of water; may slow absorption of medications if taken together — space by at least 2 hours.

I feel okay and want to build a resilient, diverse gut for the long haul

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Prebiotics
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Feeds the good bacteria already in your gut
Why this matches
Since you want to build gut health for the long haul, prebiotics give the beneficial bacteria you already have the fuel they need to grow and diversify.
Why try it
Prebiotics are non-digestible fibres that selectively feed beneficial gut bacteria. A meta-analysis of randomised trials found prebiotic supplementation significantly raised Bifidobacteria levels, making them a well-evidenced, foundational way to nourish a diverse microbiome. The pooled trials were largely in older adults, so the size of the effect at other ages is less certain.
Dose or use
Follow product labeling; typically around 3–5 g daily, increased gradually to reduce gas.
Time to results
Typically 2–4 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — pooling 29 randomised trials, prebiotic supplementation significantly increased beneficial Bifidobacteria (SMD 1.09).
Caution
May cause temporary bloating or gas; increase the dose slowly and ease off if uncomfortable, especially if you have IBS.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.
Inulin
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Prebiotic fibre that fuels a diverse microbiome
Why this matches
For a long-term approach, inulin is a well-characterised prebiotic fibre that feeds friendly gut bacteria and gently supports regularity.
Why try it
Inulin is a soluble prebiotic fibre found naturally in many plants; it ferments in the colon to nourish beneficial bacteria and encourage a healthier microbial balance.
Dose or use
Start at 3–5 g daily with water and build up gradually to around 10 g as tolerated.
Time to results
Typically 2–4 weeks
Key study
Ungraded here: inulin is widely described as a prebiotic fibre that supports gut bacteria, but this specific use is not backed by a controlled clinical trial cited in the library.
Caution
Can cause gas or bloating, particularly at higher doses or if you have IBS; increase the amount slowly.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
Magnesium
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Foundational mineral supporting gut motility long-term
Why this matches
For a proactive approach, magnesium is traditionally used to support smooth gut motility and a relaxed nervous system, both of which underpin a thriving microbiome over time.
Why try it
Traditionally used to promote healthy bowel regularity and reduce gut tension; adequate magnesium supports the parasympathetic 'rest-and-digest' state that allows the microbiome to flourish.
Dose or use
200–400 mg elemental magnesium (glycinate or citrate forms) daily in the evening.
Time to results
Typically 2–6 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High doses can cause loose stools; reduce dose if this occurs. Consult a practitioner if you have kidney disease.

I'm run-down and catch every bug — my gut defenses feel off

Berberine
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Plant alkaloid shown in trials to reshape gut flora
Why this matches
If your gut flora feels out of balance, berberine has human-trial evidence for reshaping the microbiome, which is why it's worth considering here.
Why try it
A systematic review of seven randomised human trials found berberine, an isoquinoline plant alkaloid, meaningfully shifted gut microbiota composition in most studies. The trials were mostly in people with metabolic or other health conditions, so its effect in an already-healthy gut is less certain.
Dose or use
Commonly 500 mg two to three times daily with meals; start at the lower end and consult a healthcare practitioner first.
Time to results
Typically 4–8 weeks
Key study
Systematic review of RCTs (2026, PMID 42356246): The Integrative Role of Berberine in Gut Microbiota Modulation and Cardiometabolic Outcomes: A Systematic Review of Randomised Clinical Trials — across seven human randomised trials, six found berberine significantly shifted gut microbiota composition.
Caution
May interact with medications including antibiotics and blood sugar-lowering drugs; avoid in pregnancy.
Vitamin D
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Deficiency check — low D affects gut immunity
Why this matches
If you're run-down and getting sick often, checking your vitamin D status matters — if you're low, correcting it can support the immune–microbiome axis.
Why try it
Traditionally used to support immune regulation; vitamin D receptors are expressed throughout the gut lining, and adequate levels are associated with healthier microbial balance.
Dose or use
1,000–2,000 IU daily with a meal containing fat; test levels with your practitioner to personalise the dose.
Time to results
Typically 6–12 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High-dose supplementation should be guided by blood testing; consult a practitioner if you have kidney disease.
Zinc
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Supports gut lining integrity and immunity
Why this matches
For those whose immunity feels compromised, zinc is traditionally used to support the gut mucosal barrier and the immune defences that begin there.
Why try it
Traditionally used to reinforce intestinal barrier function and immune cell activity, both of which are closely tied to a healthy gut microbiome.
Dose or use
8–15 mg of elemental zinc daily with food; consult a healthcare practitioner before longer-term use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Long-term high-dose use can deplete copper; do not exceed 40 mg daily without guidance.

I'm stressed and sleeping badly, and my gut feels every bit of it

Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Ashwagandha
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Adaptogen calming the stress–gut axis
Why this matches
For those whose stress and poor sleep are visibly affecting their gut, ashwagandha is traditionally used to modulate the stress response that drives gut dysbiosis.
Why try it
Traditionally used as an adaptogenic herb to help the body manage stress hormones, which in turn can reduce stress-related disruption to the gut microbiome.
Dose or use
300–600 mg of a standardised root extract daily; consult a healthcare practitioner before use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid in pregnancy; may interact with thyroid and immunosuppressant medications; consult your practitioner if you have autoimmune conditions.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

How would you rather support your gut?

I'd rather fix it through food and everyday diet

Kefir
Supported by smaller clinical studies (Evidence grade B · No traditional record)
Directly modulates gut bacteria diversity
Why this matches
If bloating or irregularity is your main concern, Kefir's studied action on gut microbial balance makes it a reasonable first option to try.
Why try it
Studied in a systematic review of human trials as a potential gut microbiota modulator that introduces beneficial live cultures into the digestive tract.
Dose or use
1 cup (roughly 250 ml) daily, plain and unsweetened where possible.
Time to results
Typically 2–4 weeks
Key study
Systematic review (2026, PMID 42036973): Kefir: A Potential Gut Microbiota Modulator: A Systematic Review of Human Interventional Studies.
Caution
Those with dairy sensitivity or lactose intolerance should start with a small amount; choose lactose-free kefir if needed.
Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Inulin
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Prebiotic fibre that fuels a diverse microbiome
Why this matches
For a long-term approach, inulin is a well-characterised prebiotic fibre that feeds friendly gut bacteria and gently supports regularity.
Why try it
Inulin is a soluble prebiotic fibre found naturally in many plants; it ferments in the colon to nourish beneficial bacteria and encourage a healthier microbial balance.
Dose or use
Start at 3–5 g daily with water and build up gradually to around 10 g as tolerated.
Time to results
Typically 2–4 weeks
Key study
Ungraded here: inulin is widely described as a prebiotic fibre that supports gut bacteria, but this specific use is not backed by a controlled clinical trial cited in the library.
Caution
Can cause gas or bloating, particularly at higher doses or if you have IBS; increase the amount slowly.
Fiber Deficiency
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Low fibre starves your gut bacteria
Why this matches
If you're bloated or irregular, it's worth checking whether you're simply not getting enough fibre, the main fuel your microbiome ferments.
Why try it
Dietary fibre is the prebiotic substrate beneficial gut bacteria depend on; too little is linked to constipation, bloating and gas and to reduced microbial diversity.
Dose or use
Aim for roughly 25–30 g of fibre daily from varied plant foods; increase gradually with plenty of water.
Time to results
Typically 1–3 weeks
Key study
Educational: flags inadequate dietary fibre as a common root cause of digestive discomfort and low microbial diversity, not a treatment claim.
Caution
Raise fibre intake slowly to avoid gas and cramping, and increase your fluids alongside it.
Psyllium Husk
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Prebiotic fibre feeds beneficial gut bacteria
Why this matches
If irregularity is a key complaint, psyllium husk adds bulk and acts as a prebiotic substrate to nourish microbiome diversity.
Why try it
Traditionally used to support bowel regularity and gut health by providing soluble fibre that beneficial gut bacteria ferment and thrive on.
Dose or use
5–10 g (1–2 teaspoons) mixed into a full glass of water, once daily.
Time to results
Typically 1–2 weeks for regularity
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Always take with plenty of water; may slow absorption of medications if taken together — space by at least 2 hours.

I'd try probiotics or prebiotics to rebalance my gut bacteria

Prebiotics
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Feeds the good bacteria already in your gut
Why this matches
Since you want to build gut health for the long haul, prebiotics give the beneficial bacteria you already have the fuel they need to grow and diversify.
Why try it
Prebiotics are non-digestible fibres that selectively feed beneficial gut bacteria. A meta-analysis of randomised trials found prebiotic supplementation significantly raised Bifidobacteria levels, making them a well-evidenced, foundational way to nourish a diverse microbiome. The pooled trials were largely in older adults, so the size of the effect at other ages is less certain.
Dose or use
Follow product labeling; typically around 3–5 g daily, increased gradually to reduce gas.
Time to results
Typically 2–4 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — pooling 29 randomised trials, prebiotic supplementation significantly increased beneficial Bifidobacteria (SMD 1.09).
Caution
May cause temporary bloating or gas; increase the dose slowly and ease off if uncomfortable, especially if you have IBS.
Berberine
Supported by smaller clinical studies· Recognised traditional use (Evidence grade B · Traditional use recognised)Recognised traditional use
Plant alkaloid shown in trials to reshape gut flora
Why this matches
If your gut flora feels out of balance, berberine has human-trial evidence for reshaping the microbiome, which is why it's worth considering here.
Why try it
A systematic review of seven randomised human trials found berberine, an isoquinoline plant alkaloid, meaningfully shifted gut microbiota composition in most studies. The trials were mostly in people with metabolic or other health conditions, so its effect in an already-healthy gut is less certain.
Dose or use
Commonly 500 mg two to three times daily with meals; start at the lower end and consult a healthcare practitioner first.
Time to results
Typically 4–8 weeks
Key study
Systematic review of RCTs (2026, PMID 42356246): The Integrative Role of Berberine in Gut Microbiota Modulation and Cardiometabolic Outcomes: A Systematic Review of Randomised Clinical Trials — across seven human randomised trials, six found berberine significantly shifted gut microbiota composition.
Caution
May interact with medications including antibiotics and blood sugar-lowering drugs; avoid in pregnancy.
Multi-strain Probiotic (50B CFU)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
May help rebalance gut bacteria
Why this matches
If you're dealing with bloating or irregularity, a multi-strain probiotic delivers a concentrated, consistent dose of beneficial bacteria to help rebalance the gut environment.
Why try it
In a randomized trial in adults taking metformin, this multi-strain probiotic was shown to shift gut microbiome composition and bile-acid pathways. That microbiome-rebalancing action is why it's relevant here; it has not been tested as a general digestive-function treatment.
Dose or use
50 billion CFU daily with food, as directed on product labeling.
Time to results
Typically 2–6 weeks
Key study
RCT (2026, PMID 41985330): a post-hoc multi-omics analysis of the ProGasMet trial found that, in metformin-treated adults studied for GI tolerability, the multi-strain probiotic modulated gut microbiome composition and bile-acid pathways.
Caution
Those who are immunocompromised should consult a healthcare practitioner before use.
Synbiotic Supplementation
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · Traditional use recognised)Recognised traditional use
Probiotics + prebiotics in one for gut balance
Why this matches
If bloating or irregularity is your concern, a synbiotic pairs beneficial bacteria with the fibre that feeds them, aiming to rebalance the gut in a single step.
Why try it
Synbiotics pair beneficial bacteria with the fibre that feeds them. In pooled randomised trials, synbiotics shifted some bacterial populations (raising Lactobacillus, lowering Pseudomonas), though the overall microbiome effect was mixed rather than uniform.
Dose or use
Follow product labeling; take daily with food.
Time to results
Typically 2–6 weeks
Key study
Systematic review and meta-analysis of RCTs (2025, PMID 41023690): Effects of probiotics, prebiotics, and synbiotics on gut microbiota in older adults — across pooled randomised trials, synbiotics increased Lactobacillus casei and reduced Pseudomonas, though effects on overall Bifidobacteria were inconsistent.
Caution
May cause temporary gas or bloating as your gut adjusts; those who are immunocompromised should consult a practitioner first.

I want to calm the stress-gut connection with mind-body support

Green Tea (EGCG)
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Calming antioxidant with gut-protective properties
Why this matches
For stress-related gut imbalance, green tea's calming L-theanine content alongside its EGCG polyphenols is traditionally used to soothe and support gut health simultaneously.
Why try it
Green tea is rich in EGCG, a polyphenol. A meta-analysis of randomised trials found polyphenol supplements raised beneficial short-chain fatty acids like butyrate in the gut. Because green tea was pooled with other polyphenol sources, its effect on its own is less certain.
Dose or use
1–3 cups of brewed green tea daily, or follow product labeling for standardised extracts; avoid high-dose EGCG supplements on an empty stomach.
Time to results
Typically 4–8 weeks
Key study
Systematic review and meta-analysis of RCTs (2026, PMID 42280405): Effects of Polyphenol Supplementation on Gut Microbiota Composition and Fecal Short-Chain Fatty Acids — across 50 randomised trials, polyphenol supplementation (a class that includes green tea catechins) significantly increased beneficial butyrate (SMD 0.48). Green tea was not isolated from other polyphenols, so its individual effect is uncertain.
Caution
High-dose EGCG supplements may affect the liver; avoid on an empty stomach and limit if sensitive to caffeine.
Ashwagandha
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Adaptogen calming the stress–gut axis
Why this matches
For those whose stress and poor sleep are visibly affecting their gut, ashwagandha is traditionally used to modulate the stress response that drives gut dysbiosis.
Why try it
Traditionally used as an adaptogenic herb to help the body manage stress hormones, which in turn can reduce stress-related disruption to the gut microbiome.
Dose or use
300–600 mg of a standardised root extract daily; consult a healthcare practitioner before use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid in pregnancy; may interact with thyroid and immunosuppressant medications; consult your practitioner if you have autoimmune conditions.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

I'd start with foundational vitamins and minerals my gut relies on

Magnesium
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Foundational mineral supporting gut motility long-term
Why this matches
For a proactive approach, magnesium is traditionally used to support smooth gut motility and a relaxed nervous system, both of which underpin a thriving microbiome over time.
Why try it
Traditionally used to promote healthy bowel regularity and reduce gut tension; adequate magnesium supports the parasympathetic 'rest-and-digest' state that allows the microbiome to flourish.
Dose or use
200–400 mg elemental magnesium (glycinate or citrate forms) daily in the evening.
Time to results
Typically 2–6 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High doses can cause loose stools; reduce dose if this occurs. Consult a practitioner if you have kidney disease.
Vitamin D
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Deficiency check — low D affects gut immunity
Why this matches
If you're run-down and getting sick often, checking your vitamin D status matters — if you're low, correcting it can support the immune–microbiome axis.
Why try it
Traditionally used to support immune regulation; vitamin D receptors are expressed throughout the gut lining, and adequate levels are associated with healthier microbial balance.
Dose or use
1,000–2,000 IU daily with a meal containing fat; test levels with your practitioner to personalise the dose.
Time to results
Typically 6–12 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
High-dose supplementation should be guided by blood testing; consult a practitioner if you have kidney disease.
Zinc
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · No traditional record)
Supports gut lining integrity and immunity
Why this matches
For those whose immunity feels compromised, zinc is traditionally used to support the gut mucosal barrier and the immune defences that begin there.
Why try it
Traditionally used to reinforce intestinal barrier function and immune cell activity, both of which are closely tied to a healthy gut microbiome.
Dose or use
8–15 mg of elemental zinc daily with food; consult a healthcare practitioner before longer-term use.
Time to results
Typically 4–8 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Long-term high-dose use can deplete copper; do not exceed 40 mg daily without guidance.

I'm open to hands-on acupressure points I can press myself

ST25 (Tianshu) - Stomach 25
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Abdominal point for bloating and irregularity
Why this matches
For bloating, gas or irregularity, ST25 sits right on the abdomen and is traditionally pressed to ease constipation, diarrhoea and IBS-type discomfort.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine as the abdominal Stomach-meridian point for digestive complaints such as constipation, diarrhoea, bloating and gas.
Dose or use
Press firmly for 1–2 minutes on each side, about two finger-widths either side of the navel, 1–2x daily.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if you are pregnant or have abdominal pain of unknown cause; ease off if it feels uncomfortable.
ST36 (Zusanli)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Acupressure point for digestive and stress relief
Why this matches
For those experiencing stress-driven gut symptoms, this traditionally used acupressure point on the stomach meridian is said to calm the gut–brain connection.
Why try it
Traditionally used in acupressure and Traditional Chinese Medicine to support digestive function and reduce stress-related tension along the gut–brain axis.
Dose or use
Press firmly 2–3 minutes, both legs, 1–2x daily — located four finger-widths below the kneecap, one finger-width outside the shinbone.
Time to results
Typically 1–4 weeks with consistent use
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Check with your healthcare provider before starting, especially if you are pregnant or breastfeeding, take prescription medication, or manage a chronic condition.

What's your gut telling you lately?

Bloating, gas, or irregular bathroom trips are bugging me right now

Fiber Deficiency

ST25 (Tianshu) - Stomach 25

I feel okay and want to build a resilient, diverse gut for the long haul

Fiber Deficiency

I'm run-down and catch every bug — my gut defenses feel off

I'm stressed and sleeping badly, and my gut feels every bit of it

ST36 (Zusanli)

How would you rather support your gut?

I'd rather fix it through food and everyday diet

Fiber Deficiency

I'd try probiotics or prebiotics to rebalance my gut bacteria

I want to calm the stress-gut connection with mind-body support

ST36 (Zusanli)

I'd start with foundational vitamins and minerals my gut relies on

I'm open to hands-on acupressure points I can press myself

ST25 (Tianshu) - Stomach 25

ST36 (Zusanli)

Natural remedies for Gut Microbiome

How people describe Gut Microbiome

The evidence behind Gut Microbiome, in one page

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What's your gut telling you lately?

Bloating, gas, or irregular bathroom trips are bugging me right now

Fiber Deficiency

ST25 (Tianshu) - Stomach 25

I feel okay and want to build a resilient, diverse gut for the long haul

Fiber Deficiency

I'm run-down and catch every bug — my gut defenses feel off

I'm stressed and sleeping badly, and my gut feels every bit of it

ST36 (Zusanli)

How would you rather support your gut?

I'd rather fix it through food and everyday diet

Fiber Deficiency

I'd try probiotics or prebiotics to rebalance my gut bacteria

I want to calm the stress-gut connection with mind-body support

ST36 (Zusanli)

I'd start with foundational vitamins and minerals my gut relies on

I'm open to hands-on acupressure points I can press myself

ST25 (Tianshu) - Stomach 25

ST36 (Zusanli)

Natural remedies for Gut Microbiome

How people describe Gut Microbiome

The evidence behind Gut Microbiome, in one page