Taking a specific probiotic every day for three months might help people who are overweight lose belly fat and weigh less.
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.
Definitively establish the overall effect size and consistency of L. gasseri BNR17 on weight and fat loss across all available high-quality trials.
A systematic review and meta-analysis of at least 5 double-blind, placebo-controlled RCTs involving adults with BMI ≥25 kg/m², using L. gasseri BNR17 at 10^10 CFU/day for 8–16 weeks, with primary outcomes of change in body weight, waist circumference, and visceral fat measured by imaging, total sample size >500.
Establish causal effects of L. gasseri BNR17 on body composition under controlled conditions.
A double-blind, placebo-controlled RCT with 200+ adults (BMI 27–35 kg/m²), randomized to receive 10^10 CFU/day of L. gasseri BNR17 or placebo for 12 weeks, measuring changes in body weight, waist circumference, and visceral fat via DEXA or MRI, with dietary and physical activity monitoring.
Assess the association between regular probiotic use and weight change over time in free-living populations.
A prospective cohort study of 1,000+ adults followed for 1 year, tracking daily intake of L. gasseri-containing products and measuring annual changes in BMI and waist circumference, adjusting for diet, exercise, and baseline health status.
Identify current patterns of probiotic use and their association with obesity status.
A national health survey of 5,000 adults assessing current probiotic supplement use and measuring BMI, waist circumference, and metabolic markers in a single time point.
Summarize existing knowledge and suggest directions for future research.
A narrative review by experts in gut microbiome and obesity summarizing clinical and mechanistic evidence on L. gasseri BNR17, including discussion of biological plausibility and gaps in evidence.