Short-Chain Fatty Acid Metabolomics in Gut Health
Summary
Short-chain fatty acids (SCFAs) are pivotal metabolites generated by microbial fermentation of indigestible carbohydrates in the colon. Chief among these are acetate, propionate and butyrate, each of which exerts distinct effects on host physiology. Butyrate serves as the primary energy source for colonocytes and promotes epithelial barrier integrity, while propionate and acetate modulate hepatic gluconeogenesis and systemic lipid metabolism. Beyond metabolic roles, SCFAs engage G-protein-coupled receptors on immune and epithelial cells, influencing inflammatory tone and mucosal immunity. Metabolomic strategies—encompassing gas chromatography–mass spectrometry (GC-MS) and liquid chromatography–tandem mass spectrometry (LC-MS/MS)—have advanced quantification of SCFAs in faecal, serum and other biological matrices. Recent methodological innovations, such as isotope-dilution workflows and rapid derivatisation chemistries, have enhanced analytical throughput and precision. Normalisation approaches that account for microbial load and sample matrix variability now enable more accurate discrimination between eubiotic and dysbiotic states. Collectively, SCFA metabolomics offers a window into gut microbiota function, informing dietary interventions, diagnostic markers of gastrointestinal disorders and the development of precision-nutrition strategies.
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Short-Chain Fatty Acid Metabolomics in Gut Health publication trend
The graph below shows the total number of articles in short-chain fatty acid metabolomics in gut health across all publications each year (not limited to Nature Index journals).
Technical terms
Short-chain fatty acids (SCFAs): Microbial metabolites of dietary fibre, primarily acetate, propionate and butyrate, with key roles in colonic health and systemic metabolism.
Metabolomics: Comprehensive analysis of small-molecule metabolites in biological samples to assess biochemical pathways and physiological states.
Dysbiosis: Imbalance in microbial community composition associated with disease or impaired host function.
UHPLC-QqQ-MS: Ultra-high-performance liquid chromatography coupled to triple-quadrupole mass spectrometry, offering high sensitivity for targeted metabolite quantification.
Derivatisation: Chemical modification of analytes to improve volatility, detectability or chromatographic behaviour in mass-spectrometric assays.
References
- Normalization of short-chain fatty acid concentration by bacterial count of stool samples improves discrimination between eubiotic and dysbiotic gut microbiota caused by Clostridioides difficile infection-. Gut Microbes (2024).
- Quantifying Gut Microbial Short-Chain Fatty Acids and Their Isotopomers in Mechanistic Studies Using a Rapid, Readily Expandable LC–MS Platform. Analytical Chemistry (2024).
- The role of short-chain fatty acids in the interplay between diet, gut microbiota, and host energy metabolism. Journal of Lipid Research (2013).
- Effects of Dietary Fibers on Short-Chain Fatty Acids and Gut Microbiota Composition in Healthy Adults: A Systematic Review. Nutrients (2022).
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