Lipids in Health and Disease · 4 authors, 3 centres
This summary was generated by AI from a single paper. It has not been reviewed by a clinician and is not clinical advice. Verify against the source before acting on it.
This narrative review summarizes evidence that fibre-rich diets enhance gut microbiota diversity and short-chain fatty acid production, which may favourably modulate cardiometabolic risk, while high-fat diets high in saturated fatty acids have the opposite effect. However, the authors note that robust conclusions about causality cannot yet be drawn from the current human evidence.
This narrative review synthesises observational and interventional human studies, with some animal and cell line evidence for mechanistic pathways, on the role of gut-derived short-chain fatty acids (SCFAs) in linking diet to cardiometabolic risk. The authors found that fibre-rich and prebiotic-supplemented diets consistently enhance gut microbiota diversity and SCFA production, while high-fat diets high in saturated fatty acids show the opposite effect. Several studies suggest the gut microbiota modulates postprandial blood glucose and blood lipid responses to diet. Animal and cell line studies have revealed potential pathways through which SCFAs mediate metabolic regulation, and limited human intervention studies appear to support these findings, though effects may be modest. The authors emphasise that this research field is still young and robust conclusions about causality cannot be made, with methodological limitations including imprecise dietary assessment methods, reliance on faecal SCFA analyses, and the small sample sizes and short durations of most human intervention studies.
