What the evidence says. Graded mixed: butyrate is the main fuel for colon cells with sound biology, but trials conflict — adults with ulcerative colitis and IBS often improve when it is added to standard care or paired with probiotics/fiber, yet a multicenter pediatric IBD RCT and human stress trials were flatly negative, and most positive results are small, short, or use combination products. (Mixed evidence: Conflicting results across studies; benefit uncertain.)
What is Butyrate (Tributyrin)?
Butyrate (Tributyrin) (Butyric acid) is a gut and immune supplement used for support gut barrier. NutriDex grades the human evidence as Mixed. Butyrate is a short-chain fatty acid your gut bacteria make when they ferment fiber; it is the primary energy source for colon lining cells and has anti-inflammatory effects. Supplements deliver it as sodium/calcium butyrate salts or tributyrin (a glyceride prodrug), usually microencapsulated to reach the colon. Human trials are genuinely split. In adults with ulcerative colitis, butyrate added to mesalazine and a recent 140-patient IBD trial showed better activity scores, calprotectin and quality of life, and a 120-patient IBS study found higher symptom relief (about 65% vs 42%) — but that used butyrate plus probiotics and fiber. Against this, a multicenter pediatric IBD RCT (300 mg/day) found no benefit over placebo, and colon-delivered butyrate did not blunt the cortisol stress response in healthy men. Metabolic effects on blood sugar are small and mostly appear with co-supplements. Promising for the gut, not yet convincing.
Purported Benefits
✓Support gut barrier
✓Add-on for ulcerative colitis
✓Ease IBS symptoms (in combinations)
✓Modest blood-sugar support
Evidence by outcome
The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.
Outcome
Evidence
Effect
Studies
Ulcerative colitis / IBD activityAdult add-on trials show benefit in IBD activity/calprotectin, but a pediatric RCT was null; results genuinely split.
Mixed
↔ mixed
3
IBS symptom reliefOne n=120 RCT showed 65% vs 42% relief, but butyrate was combined with probiotics + FOS, so attribution is unclear.
Preliminary
↑ benefit · moderate
1
Blood-sugar / fasting glucoseGlucose fell only when butyrate was paired with inulin; standalone metabolic effect not established.
Preliminary
↔ mixed · small
1
Stress / cortisol responseAn SCFA mixture blunted cortisol, but butyrate alone did not affect acute stress in a later RCT.
Mixed
↔ mixed · negligible
2
Dosing & Compounds
Typical Dose
Microencapsulated sodium butyrate 300–600 mg/day (active), or tributyrin 0.2–4 g/day; gut-targeted forms are used to survive the upper GI tract.
Oral butyrate is generally well tolerated; the most common complaints are mild GI upset, bloating and a foul taste/odor (tributyrin and salts smell of rancid butter), which microencapsulation reduces. No serious adverse events were reported in IBD/IBS trials and no specific drug interactions are established, but because butyrate may lower blood glucose and modestly affect GLP-1, people on antidiabetic drugs (insulin, sulfonylureas) should monitor for additive lowering. It is an adjunct, not a replacement for prescribed colitis therapy; safety in pregnancy, breastfeeding and young children is not well studied, so use under clinician guidance. Educational only — always check with your doctor or pharmacist before combining Butyrate (Tributyrin) with any medicine.
Butyrate (Tributyrin) is most often taken for Support gut barrier, Add-on for ulcerative colitis, Ease IBS symptoms (in combinations), Modest blood-sugar support. Gut-cell fuel marketed for colitis and metabolic health.
Does Butyrate (Tributyrin) work — what does the evidence say?
Mixed evidence. Conflicting results across studies; benefit uncertain. Butyrate is a short-chain fatty acid your gut bacteria make when they ferment fiber; it is the primary energy source for colon lining cells and has anti-inflammatory effects. Supplements deliver it as sodium/calcium butyrate salts or tributyrin (a glyceride prodrug), usually microencapsulated to reach the colon. Human trials are genuinely split. In adults with ulcerative colitis, butyrate added to mesalazine and a recent 140-patient IBD trial showed better activity scores, calprotectin and quality of life, and a 120-patient IBS study found higher symptom relief (about 65% vs 42%) — but that used butyrate plus probiotics and fiber. Against this, a multicenter pediatric IBD RCT (300 mg/day) found no benefit over placebo, and colon-delivered butyrate did not blunt the cortisol stress response in healthy men. Metabolic effects on blood sugar are small and mostly appear with co-supplements. Promising for the gut, not yet convincing.
What is the typical dose of Butyrate (Tributyrin)?
Microencapsulated sodium butyrate 300–600 mg/day (active), or tributyrin 0.2–4 g/day; gut-targeted forms are used to survive the upper GI tract.
Is Butyrate (Tributyrin) safe? Any cautions or side effects?
Oral butyrate is generally well tolerated; the most common complaints are mild GI upset, bloating and a foul taste/odor (tributyrin and salts smell of rancid butter), which microencapsulation reduces. No serious adverse events were reported in IBD/IBS trials and no specific drug interactions are established, but because butyrate may lower blood glucose and modestly affect GLP-1, people on antidiabetic drugs (insulin, sulfonylureas) should monitor for additive lowering. It is an adjunct, not a replacement for prescribed colitis therapy; safety in pregnancy, breastfeeding and young children is not well studied, so use under clinician guidance.
How many studies support Butyrate (Tributyrin)?
NutriDex cites 8 sources for Butyrate (Tributyrin), graded "Mixed".
Cite this page
APA
Peh, D. (2026). Butyrate (Tributyrin) (Butyric acid): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 16 Sept 2026, from https://nutridex.info/s/butyrate
BibTeX
@misc{nutridex_butyrate,
author = {Peh, Daryl},
title = {Butyrate (Tributyrin) (Butyric acid): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/butyrate},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-09-16}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.