Last verified: 17 days ago
Butyrate
Also known as: sodium butyrate, NaBut, short-chain fatty acid, SCFA, butyric acid, beta-hydroxybutyrate precursor
Evidence under review. — Not yet rated
Gut-derived fatty acid that may support metabolic health and gut barrier function. Early human evidence.
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What it does
Butyrate is a short-chain fatty acid naturally produced when gut bacteria ferment dietary fiber. In a small clinical trial, oral sodium butyrate supplementation supported weight loss in people...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose from provided studies
What the Science Says
Butyrate is a short-chain fatty acid naturally produced when gut bacteria ferment dietary fiber. In a small clinical trial, oral sodium butyrate supplementation supported weight loss in people with obesity and improved blood sugar control and triglycerides in people with type 2 diabetes. Lab studies also suggest it helps protect the airway and gut lining from inflammatory damage, though most of this evidence comes from cell studies rather than human trials.
What It Doesn't Do
Not proven to treat or reverse Alzheimer's disease. No solid human evidence it directly improves bone density. Won't replace diabetes medication. Evidence for cancer pain relief comes from a multi-ingredient postbiotic product, not butyrate alone. Most exciting claims are still based on animal or cell studies.
Evidence-Based Benefits
Oral sodium butyrate supported greater weight loss than placebo in adults with obesity without diabetes.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Sodium butyrate improved time-in-tight blood sugar range in adults with type 2 diabetes.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Sodium butyrate reduced plasma triglycerides in adults with type 2 diabetes.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Butyrate at physiological doses reduced allergen-triggered inflammation in human bronchial cells.
Weak EvidenceEffective at: 1–100 µM (in vitro)
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Poor to Moderate — butyrate is rapidly absorbed and metabolized by colonocytes and the liver after oral ingestion, limiting systemic availability. One RCT confirmed that oral sodium butyrate does raise serum butyrate levels, suggesting some systemic absorption occurs.
Red Flags to Watch For
- Most human evidence comes from a single small proof-of-concept RCT (n=46); results need replication in larger trials before strong conclusions can be drawn.
- Oral butyrate has a strong, unpleasant odor and taste; many products use enteric-coated capsules to mask this, but coating may affect absorption.
- Weight loss results in the RCT were only seen in non-diabetic participants; people with type 2 diabetes did not lose more weight than placebo.
- Many marketed benefits (Alzheimer's prevention, bone health, cancer therapy) are based on theoretical mechanisms or animal data, not human clinical trials.
- Supplement products vary widely in dose and formulation; no standardized effective dose has been established.
Products Containing Butyrate
See how Butyrate is used in these analyzed products:
Frequently Asked Questions
What does Butyrate do?
Gut-derived fatty acid that may support metabolic health and gut barrier function. Early human evidence.
What is the effective dose of Butyrate?
No established dose from provided studies
Is Butyrate safe?
Most human evidence comes from a single small proof-of-concept RCT (n=46); results need replication in larger trials before strong conclusions can be drawn.
What doesn't Butyrate do?
Not proven to treat or reverse Alzheimer's disease.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25