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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.