Understanding Butyrate: Normal vs Optimal Ranges

?What is Butyrate?

Butyrate (n-butyrate) is the most important short-chain fatty acid for colon health, produced by bacterial fermentation of dietary fibre. It is the primary energy source for colonocytes (colon lining cells), making up 70% of their energy needs. Butyrate also acts as a histone deacetylase inhibitor, regulating gene expression and exerting anti-cancer, anti-inflammatory effects.

!Why It Matters

Low faecal butyrate concentration is associated with compromised colonocyte health, increased intestinal permeability, colorectal cancer risk, inflammatory bowel disease, and systemic inflammation. Adequate butyrate production requires specific fibre-fermenting bacteria (Faecalibacterium prausnitzii, Roseburia, Butyrivibrio). Butyrate also crosses into circulation, where it modulates immune function systemically.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Low butyrate: constipation, poor colon health, increased cancer risk
• IBD: depleted butyrate production in active disease

How to Improve Your Levels

• 1Eat fibre specifically fermented to butyrate: resistant starch, pectin, inulin
• 2Foods: cooked and cooled potatoes, legumes, onions, garlic, asparagus
• 3Sodium butyrate or tributyrin supplements can directly supplement butyrate
• 4Healthy gut microbiome through diverse plant-based diet and fermented foods

When to Test

As part of gut microbiome stool analysis; colorectal cancer risk assessment; IBD management.

Related Biomarkers