The gut bacterium Prevotella is found in higher amounts in people with obesity and low good cholesterol, even among those eating healthy plant-based diets, indicating its effects on metabolism may vary depending on other factors.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether Prevotella abundance is consistently associated with obesity and low HDL-C across diverse populations and dietary contexts, or whether its effects vary by ethnicity, diet composition, or host genetics.
A systematic review and meta-analysis of studies measuring Prevotella abundance via 16S rRNA or shotgun metagenomics in relation to BMI and HDL-C across populations with varying plant-based diets (Asian, Western, African), adjusting for dietary fiber intake, age, and metabolic health status.
Whether increasing Prevotella abundance through dietary intervention directly causes worsening of BMI or HDL-C in adults.
A 6-month RCT of 100 adults randomized to a high-fiber diet designed to increase Prevotella abundance (e.g., whole grains, legumes, resistant starch) vs. a low-fiber control, measuring changes in Prevotella abundance, BMI, and HDL-C as primary outcomes.
Whether baseline Prevotella abundance predicts future development of obesity or low HDL-C in adults with varying dietary patterns.
A prospective cohort study of 3,000 Korean adults measuring Prevotella abundance via metagenomics and dietary intake at baseline, then tracking incident obesity and HDL-C <40 mg/dL over 8 years, stratified by hPDI/uPDI levels.
Whether Prevotella abundance correlates with BMI and HDL-C at a single time point in a population.
A cross-sectional analysis of 2,500 adults measuring Prevotella abundance via 16S rRNA and correlating it with BMI and HDL-C, as performed in this study.
Whether extreme cases of high Prevotella abundance coincide with metabolic dysfunction in individuals with plant-rich diets.
A case series of 10 individuals with very high Prevotella abundance (>15% of microbiome) and BMI ≥30 or HDL-C <40 mg/dL, documenting their dietary patterns and metabolic profiles.