NutriDex

The Supplement Research Compendium
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Butyrate (Tributyrin)

Butyric acid

Gut-cell fuel marketed for colitis and metabolic health.

Mixed evidence 🛡️Gut & Immune

✚ Updated · How we grade evidence

Evidence tier
Mixed
Research weight
Citations
7 verified / 7
Classification
Gut & Immune
❝
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.

OutcomeEvidenceEffectStudies
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.
Active Compounds
Butyric acid (short-chain fatty acid)Sodium/calcium butyrate saltsTributyrin (glyceride prodrug)

Safety & Cautions

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.

Key Studies

RCT Facchin 2026 ✓ PubMed
Microencapsulated butyrate add-on in 140 IBD patients: improved Crohn's activity and calprotectin (p=0.013/0.047) and quality of life; benefit greatest in low Firmicutes/Bacteroidota.
RCT Gąsiorowska 2024 ✓ PubMed
IBS RCT (n=120) of microencapsulated butyrate + probiotics + FOS: adequate symptom relief 64.7% vs 42.0% at 4 wk (p=0.023).
RCT Dalile 2024 ✓ PubMed
Colonic butyrate alone 5.28 g/day for 1 wk (n=71 men): no effect on acute stress or cortisol; modulated subjective fear memory only.
RCT Pietrzak 2022 ✓ PubMed
Multicenter pediatric IBD RCT, 300 mg/day sodium butyrate for 12 wk (n=72): no efficacy; remission 62% vs 72% placebo, no calprotectin difference.
RCT Dalile 2020 ✓ PubMed
Colon-delivered SCFA mixture (incl. butyrate) lowered the cortisol response to psychosocial stress in 66 healthy men vs placebo.
RCT Roshanravan 2017 ✓ PubMed
Type 2 diabetes RCT (n=60): only sodium butyrate (600 mg) + inulin significantly cut fasting glucose; butyrate raised GLP-1 vs placebo.
RCT Vernia 2000 ✓ PubMed
Sodium butyrate 4 g/day + mesalazine vs mesalazine alone in UC (n=25 completers): greater clinical/disease-activity improvement, not statistically significant.
7 sources cited · 7 verified Search all studies on PubMed ↗

Common questions about Butyrate (Tributyrin)

What is Butyrate (Tributyrin) used for?

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 7 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 26 Jun 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 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

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