Small Intestinal Bacterial Overgrowth (SIBO): What's bothering you most with your SIBO right now?

Commonly suggested options include probiotics, caprylic acid, high-allicin garlic, berberine, vitamin B12 (Cobalamin) Deficiency and partially hydrolyzed guar gum.

Small Intestinal Bacterial Overgrowth (SIBO): What kind of help would you rather start with?

Commonly suggested options include probiotics, partially hydrolyzed guar gum, ginger, SIBO Diet (Low-fermentation), vitamin B12 (Cobalamin) Deficiency and ST25 (Tianshu) - Stomach 25.

Small Intestinal Bacterial Overgrowth (SIBO): natural remedies and the evidence behind them

10 options · 1 graded B · 1 graded C · 8 traditional or ungraded

What's bothering you most with your SIBO right now?

I want to tackle the overgrowth itself and rebalance my gut bacteria

Probiotics
Supported by smaller clinical studies· Centuries of traditional use (Evidence grade B · Traditional use long-standing)Long-standing traditional staple
May help clear overgrowth and rebalance the gut
Why this matches
If your focus is on clearing the overgrowth and restoring gut balance, probiotics are live beneficial microorganisms studied specifically for helping the gut clear a bacterial overgrowth and settle related symptoms.
Why try it
A 2017 meta-analysis in people with SIBO found that probiotics were associated with a significantly higher clearance (decontamination) rate than no probiotics, along with lower breath hydrogen and less abdominal pain. Note the same analysis did not find probiotics prevented SIBO from developing, so this is a support-and-clearance role rather than prevention.
Dose or use
Follow product labeling; consult a healthcare practitioner. Strains and doses varied across studies, so there is no single proven regimen.
Time to results
Typically 2-8 weeks
Key study
Meta-analysis (2017, PMID 28267052): Probiotics for Preventing and Treating Small Intestinal Bacterial Overgrowth: A Meta-Analysis and Systematic Review of Current Evidence. Pooling studies in people with SIBO, the probiotics group had a significantly higher SIBO decontamination rate than the non-probiotic group (RR 1.61, 95% CI 1.19-2.17) and lower breath hydrogen; probiotics did not significantly prevent new SIBO.
Caution
Probiotics are generally well tolerated but can temporarily increase gas or bloating when introduced; some clinicians prefer to time them around, rather than during, active SIBO treatment. Start low, and check with your provider first if you are immunocompromised or seriously ill.
Caprylic acid
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Antimicrobial fatty acid used in SIBO protocols
Why this matches
If your focus is on clearing the overgrowth, caprylic acid is a medium-chain fatty acid whose traditional use includes reducing unwanted bacterial and fungal growth in the gut.
Why try it
A medium-chain fatty acid (from coconut and palm oil) traditionally used for its antimicrobial action; it is a common part of natural gut-rebalancing routines.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
May cause nausea or loose stools when introduced; start low and check with your provider if you have gut inflammation.
High-allicin garlic
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Herbal antimicrobial used to rebalance the gut
Why this matches
If you want to clear the overgrowth, high-allicin garlic is a botanical whose allicin content gives it a long traditional use as an antimicrobial in gut-rebalancing routines.
Why try it
Traditionally used as an antimicrobial botanical, particularly in herbal approaches to bacterial overgrowth; offered as a distinct option alongside berberine.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
Whole garlic is high-FODMAP and may worsen bloating; standardized allicin extracts differ. May thin blood and interact with blood-thinning medications.
Berberine
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Traditionally used for gut bacterial balance
Why this matches
If your focus is on reducing bacterial overgrowth and restoring a healthier gut environment, berberine has a long traditional-use history as an antimicrobial herb.
Why try it
Traditionally used to help inhibit unwanted bacterial growth in the digestive tract and support a more balanced gut microbiome.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
Not recommended during pregnancy; may interact with certain medications — check with your healthcare provider.

I'm run-down and worried SIBO is stealing my nutrients

Probiotics
Supported by smaller clinical studies· Centuries of traditional use (Evidence grade B · Traditional use long-standing)Long-standing traditional staple
May help clear overgrowth and rebalance the gut
Why this matches
If your focus is on clearing the overgrowth and restoring gut balance, probiotics are live beneficial microorganisms studied specifically for helping the gut clear a bacterial overgrowth and settle related symptoms.
Why try it
A 2017 meta-analysis in people with SIBO found that probiotics were associated with a significantly higher clearance (decontamination) rate than no probiotics, along with lower breath hydrogen and less abdominal pain. Note the same analysis did not find probiotics prevented SIBO from developing, so this is a support-and-clearance role rather than prevention.
Dose or use
Follow product labeling; consult a healthcare practitioner. Strains and doses varied across studies, so there is no single proven regimen.
Time to results
Typically 2-8 weeks
Key study
Meta-analysis (2017, PMID 28267052): Probiotics for Preventing and Treating Small Intestinal Bacterial Overgrowth: A Meta-Analysis and Systematic Review of Current Evidence. Pooling studies in people with SIBO, the probiotics group had a significantly higher SIBO decontamination rate than the non-probiotic group (RR 1.61, 95% CI 1.19-2.17) and lower breath hydrogen; probiotics did not significantly prevent new SIBO.
Caution
Probiotics are generally well tolerated but can temporarily increase gas or bloating when introduced; some clinicians prefer to time them around, rather than during, active SIBO treatment. Start low, and check with your provider first if you are immunocompromised or seriously ill.
Vitamin B12 (Cobalamin) Deficiency
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Common nutrient shortfall in long-standing SIBO
Why this matches
If you feel run-down or worried about absorption, B12 is the nutrient most often depleted in SIBO because overgrown bacteria consume dietary B12 before your body can absorb it.
Why try it
Recognizing a possible B12 shortfall matters because it is a well-documented consequence of SIBO and can cause fatigue, and, if severe, anemia and nerve symptoms.
Dose or use
Ask your practitioner about testing B12 levels; supplement only under guidance.
Time to results
Energy may improve over weeks once levels are corrected
Key study
Traditionally recognized as a consequence of this condition; this specific link has not been reframed here from a controlled clinical trial.
Caution
Fatigue and tingling have many causes; confirm a shortfall with testing rather than self-treating.

My gut feels slow and backed up — things just don't move through

Partially hydrolyzed guar gum
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Supports motility, reduces bloating discomfort
Why this matches
If sluggishness and bloating are your main complaints, this soluble fiber has preliminary evidence as an add-on: one clinical trial suggested it may improve results when combined with antibiotic treatment, possibly by supporting gut transit.
Why try it
One clinical trial found that adding it to antibiotic treatment was associated with better SIBO eradication than antibiotic treatment alone. It has not been studied as a standalone therapy for SIBO, so evidence is preliminary and adjunct-only.
Dose or use
Follow product labeling; consult a healthcare practitioner.
Time to results
Typically 4–8 weeks
Key study
Randomized trial (2010, PMID 20937045): rifaximin plus partially hydrolysed guar gum eradicated SIBO more often than rifaximin alone; guar gum was not tested on its own, so its independent effect is unknown.
Caution
Introduce slowly to avoid temporary gas; check with your practitioner if you have severe motility issues.
Ginger
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Traditional prokinetic for a sluggish gut
Why this matches
If your gut feels sluggish and backed up, ginger has a long traditional use as a digestive aid that helps stimulate movement through the gut and ease indigestion.
Why try it
Traditionally used to support gut motility and relieve chronic indigestion; impaired motility is a common driver of SIBO symptoms.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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 may cause heartburn or interact with blood-thinning medications; check with your provider.
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 gas
Why this matches
If your gut feels sluggish and bloated, ST25 sits on the abdomen beside the navel and is traditionally used to ease bloating, gas and irregular bowel movements.
Why try it
A Traditional Chinese Medicine point used in self-care to relieve bloating, gas and constipation and support regular digestion.
Dose or use
Apply gentle circular pressure about two finger-widths either side of the navel for 1-2 minutes.
Time to results
May ease discomfort within minutes; regular use over weeks for ongoing support
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if pregnant or over recent surgery or a hernia; keep pressure gentle.

The bloating and gas — my belly balloons up and I want it calmer

Partially hydrolyzed guar gum
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Supports motility, reduces bloating discomfort
Why this matches
If sluggishness and bloating are your main complaints, this soluble fiber has preliminary evidence as an add-on: one clinical trial suggested it may improve results when combined with antibiotic treatment, possibly by supporting gut transit.
Why try it
One clinical trial found that adding it to antibiotic treatment was associated with better SIBO eradication than antibiotic treatment alone. It has not been studied as a standalone therapy for SIBO, so evidence is preliminary and adjunct-only.
Dose or use
Follow product labeling; consult a healthcare practitioner.
Time to results
Typically 4–8 weeks
Key study
Randomized trial (2010, PMID 20937045): rifaximin plus partially hydrolysed guar gum eradicated SIBO more often than rifaximin alone; guar gum was not tested on its own, so its independent effect is unknown.
Caution
Introduce slowly to avoid temporary gas; check with your practitioner if you have severe motility issues.
SIBO Diet (Low-fermentation)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Low-fermentation eating to ease bloating and gas
Why this matches
If bloating and gas are your main complaint, a low-fermentation eating pattern reduces the fermentable foods that feed overgrown bacteria and produce gas.
Why try it
A low-fermentation, lower-FODMAP way of eating is widely used as a first-line self-management approach to reduce the substrate driving bloating.
Dose or use
Work with a practitioner or dietitian to structure and reintroduce foods.
Time to results
Often within 1-4 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Restrictive eating can narrow nutrient intake if followed long-term; do it with guidance and reintroduce foods over time.
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 gas
Why this matches
If your gut feels sluggish and bloated, ST25 sits on the abdomen beside the navel and is traditionally used to ease bloating, gas and irregular bowel movements.
Why try it
A Traditional Chinese Medicine point used in self-care to relieve bloating, gas and constipation and support regular digestion.
Dose or use
Apply gentle circular pressure about two finger-widths either side of the navel for 1-2 minutes.
Time to results
May ease discomfort within minutes; regular use over weeks for ongoing support
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if pregnant or over recent surgery or a hernia; keep pressure gentle.
REN12 (Zhongwan)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Upper-abdomen point for bloating and indigestion
Why this matches
If bloating and a heavy, backed-up feeling bother you, REN12 sits on the midline above the navel and is traditionally used to settle bloating and indigestion.
Why try it
A Traditional Chinese Medicine point used in self-care to relieve bloating, indigestion and general stomach discomfort.
Dose or use
Apply gentle pressure on the midline about halfway between the navel and the base of the breastbone for 1-2 minutes.
Time to results
May ease discomfort within minutes; regular use over weeks for ongoing support
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm pressure if pregnant, after eating a large meal, or over recent abdominal surgery; keep it gentle.

What kind of help would you rather start with?

Gentle daily supplements that support motility and gut balance

Probiotics
Supported by smaller clinical studies· Centuries of traditional use (Evidence grade B · Traditional use long-standing)Long-standing traditional staple
May help clear overgrowth and rebalance the gut
Why this matches
If your focus is on clearing the overgrowth and restoring gut balance, probiotics are live beneficial microorganisms studied specifically for helping the gut clear a bacterial overgrowth and settle related symptoms.
Why try it
A 2017 meta-analysis in people with SIBO found that probiotics were associated with a significantly higher clearance (decontamination) rate than no probiotics, along with lower breath hydrogen and less abdominal pain. Note the same analysis did not find probiotics prevented SIBO from developing, so this is a support-and-clearance role rather than prevention.
Dose or use
Follow product labeling; consult a healthcare practitioner. Strains and doses varied across studies, so there is no single proven regimen.
Time to results
Typically 2-8 weeks
Key study
Meta-analysis (2017, PMID 28267052): Probiotics for Preventing and Treating Small Intestinal Bacterial Overgrowth: A Meta-Analysis and Systematic Review of Current Evidence. Pooling studies in people with SIBO, the probiotics group had a significantly higher SIBO decontamination rate than the non-probiotic group (RR 1.61, 95% CI 1.19-2.17) and lower breath hydrogen; probiotics did not significantly prevent new SIBO.
Caution
Probiotics are generally well tolerated but can temporarily increase gas or bloating when introduced; some clinicians prefer to time them around, rather than during, active SIBO treatment. Start low, and check with your provider first if you are immunocompromised or seriously ill.
Partially hydrolyzed guar gum
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Supports motility, reduces bloating discomfort
Why this matches
If sluggishness and bloating are your main complaints, this soluble fiber has preliminary evidence as an add-on: one clinical trial suggested it may improve results when combined with antibiotic treatment, possibly by supporting gut transit.
Why try it
One clinical trial found that adding it to antibiotic treatment was associated with better SIBO eradication than antibiotic treatment alone. It has not been studied as a standalone therapy for SIBO, so evidence is preliminary and adjunct-only.
Dose or use
Follow product labeling; consult a healthcare practitioner.
Time to results
Typically 4–8 weeks
Key study
Randomized trial (2010, PMID 20937045): rifaximin plus partially hydrolysed guar gum eradicated SIBO more often than rifaximin alone; guar gum was not tested on its own, so its independent effect is unknown.
Caution
Introduce slowly to avoid temporary gas; check with your practitioner if you have severe motility issues.
Ginger
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Traditional prokinetic for a sluggish gut
Why this matches
If your gut feels sluggish and backed up, ginger has a long traditional use as a digestive aid that helps stimulate movement through the gut and ease indigestion.
Why try it
Traditionally used to support gut motility and relieve chronic indigestion; impaired motility is a common driver of SIBO symptoms.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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 may cause heartburn or interact with blood-thinning medications; check with your provider.

Changing how I eat and checking my nutrient levels first

Partially hydrolyzed guar gum
Limited human trials so far· Most of the research is laboratory or animal work (Evidence grade C · No traditional record)
Supports motility, reduces bloating discomfort
Why this matches
If sluggishness and bloating are your main complaints, this soluble fiber has preliminary evidence as an add-on: one clinical trial suggested it may improve results when combined with antibiotic treatment, possibly by supporting gut transit.
Why try it
One clinical trial found that adding it to antibiotic treatment was associated with better SIBO eradication than antibiotic treatment alone. It has not been studied as a standalone therapy for SIBO, so evidence is preliminary and adjunct-only.
Dose or use
Follow product labeling; consult a healthcare practitioner.
Time to results
Typically 4–8 weeks
Key study
Randomized trial (2010, PMID 20937045): rifaximin plus partially hydrolysed guar gum eradicated SIBO more often than rifaximin alone; guar gum was not tested on its own, so its independent effect is unknown.
Caution
Introduce slowly to avoid temporary gas; check with your practitioner if you have severe motility issues.
SIBO Diet (Low-fermentation)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Low-fermentation eating to ease bloating and gas
Why this matches
If bloating and gas are your main complaint, a low-fermentation eating pattern reduces the fermentable foods that feed overgrown bacteria and produce gas.
Why try it
A low-fermentation, lower-FODMAP way of eating is widely used as a first-line self-management approach to reduce the substrate driving bloating.
Dose or use
Work with a practitioner or dietitian to structure and reintroduce foods.
Time to results
Often within 1-4 weeks
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Restrictive eating can narrow nutrient intake if followed long-term; do it with guidance and reintroduce foods over time.
Vitamin B12 (Cobalamin) Deficiency
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Common nutrient shortfall in long-standing SIBO
Why this matches
If you feel run-down or worried about absorption, B12 is the nutrient most often depleted in SIBO because overgrown bacteria consume dietary B12 before your body can absorb it.
Why try it
Recognizing a possible B12 shortfall matters because it is a well-documented consequence of SIBO and can cause fatigue, and, if severe, anemia and nerve symptoms.
Dose or use
Ask your practitioner about testing B12 levels; supplement only under guidance.
Time to results
Energy may improve over weeks once levels are corrected
Key study
Traditionally recognized as a consequence of this condition; this specific link has not been reframed here from a controlled clinical trial.
Caution
Fatigue and tingling have many causes; confirm a shortfall with testing rather than self-treating.

Simple hands-on techniques I can do myself for quick relief

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 gas
Why this matches
If your gut feels sluggish and bloated, ST25 sits on the abdomen beside the navel and is traditionally used to ease bloating, gas and irregular bowel movements.
Why try it
A Traditional Chinese Medicine point used in self-care to relieve bloating, gas and constipation and support regular digestion.
Dose or use
Apply gentle circular pressure about two finger-widths either side of the navel for 1-2 minutes.
Time to results
May ease discomfort within minutes; regular use over weeks for ongoing support
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm abdominal pressure if pregnant or over recent surgery or a hernia; keep pressure gentle.
REN12 (Zhongwan)
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Upper-abdomen point for bloating and indigestion
Why this matches
If bloating and a heavy, backed-up feeling bother you, REN12 sits on the midline above the navel and is traditionally used to settle bloating and indigestion.
Why try it
A Traditional Chinese Medicine point used in self-care to relieve bloating, indigestion and general stomach discomfort.
Dose or use
Apply gentle pressure on the midline about halfway between the navel and the base of the breastbone for 1-2 minutes.
Time to results
May ease discomfort within minutes; regular use over weeks for ongoing support
Key study
Traditionally used for this condition; this specific use has not been confirmed in controlled clinical trials.
Caution
Avoid firm pressure if pregnant, after eating a large meal, or over recent abdominal surgery; keep it gentle.

Targeted herbal antimicrobials to help knock back the overgrowth

Caprylic acid
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Antimicrobial fatty acid used in SIBO protocols
Why this matches
If your focus is on clearing the overgrowth, caprylic acid is a medium-chain fatty acid whose traditional use includes reducing unwanted bacterial and fungal growth in the gut.
Why try it
A medium-chain fatty acid (from coconut and palm oil) traditionally used for its antimicrobial action; it is a common part of natural gut-rebalancing routines.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
May cause nausea or loose stools when introduced; start low and check with your provider if you have gut inflammation.
High-allicin garlic
Centuries of traditional use· Human evidence not yet assessed (Evidence grade not assigned · Traditional use long-standing)Long-standing traditional staple
Herbal antimicrobial used to rebalance the gut
Why this matches
If you want to clear the overgrowth, high-allicin garlic is a botanical whose allicin content gives it a long traditional use as an antimicrobial in gut-rebalancing routines.
Why try it
Traditionally used as an antimicrobial botanical, particularly in herbal approaches to bacterial overgrowth; offered as a distinct option alongside berberine.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
Whole garlic is high-FODMAP and may worsen bloating; standardized allicin extracts differ. May thin blood and interact with blood-thinning medications.
Berberine
Not yet assessed· We have not reviewed the literature for this one (Evidence grade not assigned · Traditional use recognised)Recognised traditional use
Traditionally used for gut bacterial balance
Why this matches
If your focus is on reducing bacterial overgrowth and restoring a healthier gut environment, berberine has a long traditional-use history as an antimicrobial herb.
Why try it
Traditionally used to help inhibit unwanted bacterial growth in the digestive tract and support a more balanced gut microbiome.
Dose or use
Follow product labeling; consult a healthcare practitioner.
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
Not recommended during pregnancy; may interact with certain medications — check with your healthcare provider.

Evidence grades describe the strength of published research for Small Intestinal Bacterial Overgrowth (SIBO), not a promise of results. Nothing here is medical advice — talk to your clinician before starting anything, especially alongside prescription medication.