Butyrate
Butyrate is the main fuel for the cells lining your gut. Your bacteria make it from fibre — but if your gut health is poor, you might not be making enough.
Butyrate is a short-chain fatty acid (SCFA) produced when your gut bacteria ferment fibre. It's the primary energy source for colonocytes — the cells that line your colon. Healthy butyrate levels mean a stronger gut barrier, less inflammation, and better digestion.
Good for you if: You have leaky gut symptoms, chronic bloating, inflammatory bowel issues, or want to strengthen your gut lining from the inside.
Dive deeper into the researchCommon side effects
- Mild stomach discomfort when starting
- Unpleasant taste/smell with some supplement forms
- Loose stools at high doses
What does butyrate do?
Your colon cells are unusual — they don't run on glucose like most cells. Their preferred fuel is butyrate. When your gut bacteria ferment dietary fibre (especially resistant starch), butyrate is the main product. It provides about 70% of the energy your colon cells need.
When butyrate levels are healthy, your gut barrier stays tight, inflammation stays low, and digestion works smoothly. When they're low — from a low-fibre diet, antibiotics, or dysbiosis — the gut barrier weakens, letting inflammatory molecules leak into your bloodstream.
What can you expect?
- Stronger gut lining — tighter junctions between colon cells
- Less bloating — reduced fermentation of undigested food
- Lower inflammation — butyrate suppresses NF-κB signalling in the gut
- Better bowel regularity — supports healthy colon motility
- Immune balance — promotes T-regulatory cells that calm overactive immunity
How to take it
Food-first: Eat more resistant starch (cooled rice, green banana flour, cooled potatoes) and soluble fibre. This is the most natural way to boost butyrate.
Supplement: Sodium butyrate or tributyrin (cal-mag butyrate) — 300–600 mg/day with food. Tributyrin reaches the colon more effectively than plain sodium butyrate.
Best form: Tributyrin is the preferred supplement form — it's a triglyceride that releases butyrate slowly in the intestine rather than being absorbed too early in the stomach.
Want to track your gut health markers?
eterni tracks inflammation markers like hsCRP over time — so you can see if your gut protocol is actually working.
Get early accessFrequently Asked Questions
Can I just eat more fibre instead of supplementing butyrate?
Absolutely — and that's the preferred approach. Resistant starch (cooled rice, green banana flour) is the most potent butyrate-producing fibre. Aim for 15–20 g of resistant starch daily. Supplements are for when you can't get enough from food or have dysbiosis that limits bacterial butyrate production.
What's the best form of butyrate supplement?
Tributyrin is the preferred form. Plain sodium butyrate is absorbed in the stomach before reaching the colon. Tributyrin is a triglyceride that releases butyrate slowly throughout the intestine, reaching the colon where it's needed most. Enteric-coated sodium butyrate is a reasonable alternative.
Does butyrate help with leaky gut?
Yes. Butyrate strengthens tight junctions between colon cells and stimulates mucin production, both of which reduce intestinal permeability. Multiple studies show butyrate supplementation reduces markers of gut permeability in both animal and human models.
How long before I notice a difference?
Most people notice improved bowel regularity and less bloating within 2–4 weeks. Changes in inflammation markers (like hsCRP) typically take 6–8 weeks of consistent use to become measurable.
How butyrate works in your body
Butyrate enters colonocytes and undergoes beta-oxidation in mitochondria, producing ATP. It also acts as a histone deacetylase (HDAC) inhibitor, which has epigenetic effects — it switches on genes involved in cell differentiation, anti-inflammation, and gut barrier integrity. Butyrate activates GPR109A (a G-protein coupled receptor), which triggers anti-inflammatory pathways and promotes T-regulatory cell differentiation in the gut-associated lymphoid tissue.
What the studies show
- Gut barrier: Butyrate increases transepithelial electrical resistance (TEER) — a measure of tight junction integrity — by 30–50% in cell studies
- Inflammation: Sodium butyrate enemas reduced mucosal inflammation scores in ulcerative colitis patients (multiple controlled trials)
- Insulin sensitivity: Oral butyrate improved insulin sensitivity in diet-induced obese mice; human trials show modest improvements in metabolic markers
- Colon cancer: Higher colonic butyrate levels are consistently associated with lower colorectal cancer risk in epidemiological studies
Side effects & safety
Butyrate is naturally produced in your body and very safe:
- Taste and smell — Sodium butyrate has a strong, unpleasant odour (rancid butter). Enteric-coated or tributyrin forms avoid this.
- GI discomfort — Mild nausea or cramping when starting. Take with food and start at a lower dose.
- Loose stools — At doses above 1,000 mg, some people experience loose stools. Reduce dose.
Who should be careful: No significant contraindications. People with active inflammatory bowel disease should start at low doses and monitor symptoms.
Which labs to check
- hsCRP — tracks systemic inflammation; should decrease with improved gut health
- Calprotectin (stool) — direct marker of gut inflammation
- Fasting glucose / HbA1c — butyrate may modestly improve insulin sensitivity
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eterni connects your lab results, supplements, and retests — so you can see the trajectory, not just a snapshot.
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