Short-chain fatty acids in clinical practice: where are we?

Abstract

Purpose of review: Once considered to have only local influences on the gut mucosa, short-chain fatty acids (SCFAs) now appear to have a much wider anti-inflammatory, immune-modulating, systemic effect. This article reviews recent evidence to suggest a much wider clinical application of this valued dietary substrate.

Recent findings: SCFAs act systemically through stimulation of G protein receptors (GPRs) and inhibition of histone deacetylases (HDACs). SCFAs cause appetite suppression, reduce systemic inflammation, improve insulin sensitivity, increase energy expenditure, promote mitochondrial function, stimulate satiety, reduce blood pressure, and improve cognitive function from various neurologic maladies.

Summary: Dietary strategies should be implemented to provide this beneficial substrate across a wide spectrum of disease conditions. Use of prebiotic fiber or liquid supplements containing high SCFA-producing organisms should be considered as therapeutic targets for multiple metabolic, immunologic, and neurodegenerative diseases.