Short-chain fatty acid production via microbial fermentation (SCFA production)

Short-chain fatty acid production via microbial fermentation refers to the generation of small organic acids—primarily acetate (C2), propionate (C3), and butyrate (C4)—by anaerobic bacteria in the large intestine through the breakdown of indigestible polysaccharides such as dietary fiber. These metabolites are crucial for colonic health because they serve as energy sources for colonocytes and modulate various physiological processes including immune regulation, metabolic homeostasis, appetite control, inflammation modulation (notably in conditions like irritable bowel syndrome), and even neurodevelopment through effects on microglia. The quantity produced depends on diet composition and microbiota diversity. While essential for maintaining gastrointestinal integrity and systemic health benefits have been described—including roles in cardiometabolic regulation—the term does not refer to any single molecular entity suitable for direct pharmacologic targeting.

Other names

SCFA biosynthesisMicrobial SCFA formationGut microbial fermentation of fiber