health
Gut-Brain Axis Support
Gut-Brain Axis Support is a broad health outcome describing efforts intended to support the relationship between the digestive system and the brain. It is not a single symptom, diagnosis, or guaranteed change that everyone will notice.
Explore Gut-Brain Axis Support as a focused health topic.
These are research findings, not promises. Most options have little evidence, and results differ from person to person.
What may help
None of these options has good evidence yet. Best evidence first.
15 options:5 not enough evidence5 not tested in people3 personal stories only2 no benefit found
MassagepracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a pooled analysis of several trials.
A pooled analysis whose designs were not recorded found lower abdominal pain symptom scores with combination therapy; 442 people were included in this outcome’s analysis.
Open the Massage pageBreathworkpracticeNot enough evidence
Too few or too small studies to know if it works.
1 of 2 studies found a benefit; 1 found none. Strongest study: a randomized controlled trial.
In a 2025 randomized trial of 85 people with GERD, bloating decreased over the study period, but the decrease was statistically significant only at Week 4 after correction for multiple comparisons. A review concluded that diaphragmatic breathing training may relieve symptoms in selected patients with GERD.
Open the Breathwork pageFastingpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a randomized controlled trial.
A randomized controlled trial in 41 people with obesity found greater reductions in gastrointestinal symptom rating scores with intermittent fasting plus probiotics than with calorie restriction: −9.3% vs. −5.4% and −13.2% vs. −3.9%, respectively.
Open the Fasting pageYogapracticeNot enough evidence
Too few or too small studies to know if it works.
1 of 2 studies found a benefit; 1 found none. Strongest study: a randomized controlled trial.
A randomized trial in people with gastrointestinal conditions found that GSRS mean scores fell from 99.23 to 16.92 in the yoga group and from 98.92 to 62.46 in the control group. Findings disagree: a pooled analysis of randomized trials involving 535 people found no difference between yoga and control groups in gastrointestinal symptom severity.
Open the Yoga pageSea Moss (Irish Moss)supplementNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Amount studied: typical intake, for chronic.
Open the Sea Moss (Irish Moss) pageAcupuncturepracticeNot tested in people
Only tested in animals, cells or theory. Results like these often do not carry over to people.
The one study found a benefit.
A proposed explanation is that acupuncture may affect gut motility and visceral sensitivity through central and peripheral nervous system pathways. This rationale has not been demonstrated in human studies.
Open the Acupuncture pageLoving-Kindness Meditation (Metta)practiceNot tested in people
Only tested in animals, cells or theory. Results like these often do not carry over to people.
The one study found a benefit.
Expert knowledge proposes that loving-kindness meditation may affect gut-brain signaling through increased vagal tone and reduced inflammation, with possible downstream effects on mood and digestion.
Open the Loving-Kindness Meditation (Metta) pageMobility TrainingpracticeNot tested in people
Only tested in animals, cells or theory. Results like these often do not carry over to people.
The one study found a benefit.
The proposed rationale is that gentle movement and joint mobilization may enhance vagal tone and support gut-brain communication.
Open the Mobility Training page
The expert view shows every study, dose protocol and source.
What may help
Linked to improving it15 listedStart here
The best we have, but the evidence is still weak
- →PracticesMassageCertaintyLowSourceRCT1 other source
A pooled analysis whose designs were not recorded found lower abdominal pain symptom scores with combination therapy (MD = -0.29; 95% CI -0.50 to -0.08, I² = 87%, P = 0.008); 442 people were included in this outcome’s analysis.
Who was studied
- People with a condition
Open MassageStudy result
Combination therapy showed a better effect on relieving abdominal pain symptom scores (MD = -0.29; 95% CI -0.50 to -0.08, I² = 87%, P = 0.008); sensitivity analysis after excluding Zhou HY: MD = -0.19, 95% CI -0.29 to -0.08, P < 0.001)
- →PracticesBreathworkCertaintyLowSourceClinical2 other sources
In a 2025 randomized trial of 85 people with GERD, bloating decreased over the study period, but the decrease was statistically significant only at Week 4 after correction for multiple comparisons. A review concluded that diaphragmatic breathing training may relieve symptoms in selected patients with GERD.
Who was studied
- People with a condition
- Gerd
Open BreathworkStudy result
In the Calmigo® group, a reduction in bloating was observed throughout the study period, but a statistically significant decrease was only detected at Week 4 after Bonferroni correction (p = 0.001), with a medium effect size (−0.709).
- →PracticesFastingCertaintyLowSourceClinical2 other sources
A randomized controlled trial in 41 people with obesity found greater reductions in gastrointestinal symptom rating scores with intermittent fasting plus probiotics than with calorie restriction: −9.3% vs. −5.4% and −13.2% vs. −3.9%, respectively.
Who was studied
- People with a condition
- Obesity
Open FastingStudy result
a more substantial reduction was observed in IF-P participants compared to CR participants (i.e., −9.3% vs. −5.4% and −13.2% vs. −3.9%, respectively) for GI symptom rating score [GSRS]
- →PracticesYogaCertaintyLowSourceClinicalModerate effectconflicting findings2 other sources
A randomized trial in people with gastrointestinal conditions found that GSRS mean scores fell from 99.23 to 16.92 in the yoga group and from 98.92 to 62.46 in the control group (n=34). Findings disagree: a pooled analysis of randomized trials involving 535 people found no difference between yoga and control groups in gastrointestinal symptom severity.
How big is the effect
Moderate effectA clear difference on average.
Who was studied
- People with a condition
- Gerd
- H Pylori
- Ibs
- Peptic Ulcer
Open YogaStudy result
significant reduction in gastrointestinal symptoms (p<0.001)... The total GSRS mean scores reduced from 99.23 to 16.92 in YG and 98.92 to 62.46 in CG (intergroup Cohen's d = -1.98)
- →PracticesNasal Irrigation (Neti Pot)CertaintyLowSourceAnecdotal2 other sources
One proposed pathway is that reducing chronic sinus inflammation could lower systemic inflammatory load and potentially affect neuroinflammation and mood regulation through the gut-brain axis. This effect was mentioned in 2 of 289 Reddit reports.
Open Nasal Irrigation (Neti Pot)Study result
Reduction in chronic sinus inflammation may lower systemic inflammatory load, potentially benefiting neuroinflammation and mood regulation via the gut-brain axis.
- →PracticesQigongCertaintyLowSourceAnecdotal2 other sources
Qigong may support communication between the gut and brain through vagal modulation, potentially helping regulate GI symptoms.
Open QigongStudy result
Through enhanced vagal modulation, qigong may support gut-brain communication and improve GI symptom regulation.
- →PracticesCoherent BreathingCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 2 of 223 Reddit reports discussing it.
Low probability(5)(0)(5)
- →PracticesAcupunctureCertaintyLowSourceTheoretical1 other source
A proposed explanation is that acupuncture may affect gut motility and visceral sensitivity through central and peripheral nervous system pathways. This rationale has not been demonstrated in human studies.
Open AcupunctureStudy result
Acupuncture modulates gut motility and visceral sensitivity via central and peripheral nervous system pathways, benefiting functional GI disorders.
- →PracticesLoving-Kindness Meditation (Metta)CertaintyLowSourceTheoretical1 other source
Expert knowledge proposes that loving-kindness meditation may affect gut-brain signaling through increased vagal tone and reduced inflammation, with possible downstream effects on mood and digestion.
Open Loving-Kindness Meditation (Metta)Study result
Improves gut-brain axis signaling via enhanced vagal tone and reduced inflammation, with downstream effects on mood and digestion.
- →PracticesMobility TrainingCertaintyLowSourceTheoretical1 other source
The proposed rationale is that gentle movement and joint mobilization may enhance vagal tone and support gut-brain communication.
Open Mobility TrainingStudy result
Gentle movement and joint mobilization may enhance vagal tone and support gut-brain communication.
- →PracticesOil PullingCertaintyLowSourceTheoretical1 other source
The proposed link is that reducing oral pathobionts through oil pulling may decrease systemic inflammatory load and modulate neuroinflammation.
Open Oil PullingStudy result
Reduction in oral pathobionts via oil pulling may decrease systemic inflammatory load and modulate neuroinflammation.
- →PracticesTai ChiCertaintyLowSourceTheoretical1 other source
Tai Chi may support communication between the gut and brain through stress reduction and autonomic regulation.
Open Tai ChiStudy result
Tai Chi may support gut-brain communication through stress reduction and autonomic regulation, though direct evidence is limited.
Very low probability(3)(1)(2)
- →PracticesDanceCertaintyVery lowSourceMeta-analysisModerate effect1 other source
A pooled analysis of randomized trials found a non-significant trend for GI dysfunction (SMD = 0.53, CI = [−0.27, 1.34], p = 0.08) among people with Cancer (General), so this finding did not support Gut-Brain Axis support.
How big is the effect
Moderate effectA clear difference on average.
Open DanceWho was studied
- People with a condition
- Cancer
- →SupplementsSea Moss (Irish Moss)CertaintyVery lowSourceReference knowledge1 other source
Carrageenan in sea moss may modulate gut microbiota composition and intestinal barrier function, indirectly influencing neuroinflammation and mood regulation via the gut-brain axis.
- →PracticesHatha YogaCertaintyVery lowSourceTheoretical3 other sources
A randomized trial of 79 people with IBS found a 32.1-point between-group difference in IBS-SSS that was not significant (P = 0.149); the studies did not support this effect.
Open Hatha YogaWho was studied
- People with a condition
- Ibs
Practices compared
Practices with at least one trial of their own for this goal. Ranked by how sure the evidence is, then effect size.| Practice | How sure | Effect size | Own trials |
|---|---|---|---|
| Breathwork | CertaintyLowSourceClinical | 1 trial or pooled analysis | |
| Fasting | CertaintyLowSourceClinical | 1 trial or pooled analysis | |
| Massage | CertaintyLowSourceRCT | 1 trial or pooled analysis |
How to read the evidence
Evidence tier — overall strength of the evidence for the whole compound
- StrongWell established — backed by strong, consistent human research.
- ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
- PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
- LimitedVery limited evidence — treat this as a hypothesis, not proof.
- InsufficientNot enough good evidence to draw conclusions yet.
Certainty — how sure we can be that the effect is real
- Very highVery sure — strong, consistent evidence
- HighFairly sure — consistent evidence from good studies
- MediumModerately sure — new studies could change this
- LowNot sure — little or mixed evidence
- Very lowVery unsure — almost no usable evidence
Source — where the data comes from
- Meta-analysisPooled analysis of many trials — the strongest evidence
- RCTRandomized controlled trial — a strong human study design
- ClinicalA human clinical study
- Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
- Animal researchStudied in animals, not humans
- Community reportsAggregated user reports — anecdotal signal, not evidence
- TheoreticalMechanism-based reasoning, not yet tested
Study grade — quality of each underlying study (A best, D weakest)
- AHigh-quality — strong, consistent human trials
- BGood — solid evidence with some limitations
- CModerate — limited, small, or mixed-quality studies
- DWeak — preliminary, indirect, or animal-only
Confidence — how strongly the sources back a finding
A 0–100 score from study quality and agreement
Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.
Full write-up
What is it
Gut-Brain Axis Support is a broad health outcome describing efforts intended to support the relationship between the digestive system and the brain. It is not a single symptom, diagnosis, or guaranteed change that everyone will notice. Interventions associated with this topic include Curcumin, Berberine, Saccharomyces Boulardii, and Coffee Enema, but they represent different approaches rather than interchangeable treatments.
How interventions help
Interventions associated with Gut-Brain Axis Support span gut-directed approaches, nutritional compounds, and mind-body practices, so they may differ in both how they are used and how their proposed effects are framed. Glycine is described in terms of enteric nervous-system signaling and possible modulation of gut-brain communication, while Hatha yoga is described through stress reduction and improved vagal activity. These represent different routes toward the same broad outcome rather than interchangeable interventions.
Duration also differs across the available descriptions. Glycine is discussed as 3-5g daily over chronic use. Berberine and Dietary Fiber (Prebiotics) are each described as having effects that may persist for weeks after stopping, although this does not establish how long any individual should use them. A Psyllium Husk study used 10 g twice daily, illustrating that findings may depend on a defined protocol rather than casual use. No consistent onset period is specified, and the available findings do not establish that one approach is reliably superior or that the same pattern applies across health statuses. Many of the listed observations also do not include human evidence, so proposed mechanisms and reported changes should not be treated as confirmed effects for everyone.
Choosing guidance
These options are difficult to compare by practical burden because amount and duration are not consistently described. Glycine is the clearest example of a defined regimen, while most other entries do not provide enough information to judge how much would be needed or how long it would be used. No option has enough information here to establish how quickly an effect might appear.
Human applicability is also limited. Most options are not supported by human evidence in the record, and several are based on anecdotal reports, a theoretical account, or a review rather than direct human study findings. Hatha Yoga is presented through a proposed gut-brain signaling explanation, but human-study detail is not provided. The absence of a recorded conflict for some entries should not be interpreted as proof that findings are consistent, since disagreement is not characterized for every option.
For readers seeking a non-supplement approach, Hatha Yoga is the distinct choice among the listed options. Glycine may be easier to evaluate in terms of intended duration and amount because those details are stated, although its support remains theoretical. The remaining options are better viewed as areas of limited or preliminary interest rather than choices that can be ranked confidently by speed, treatment burden, or applicability to a particular person.