Taking a probiotic called Bifidobacterium breve B-3 daily for three months might help reduce body fat and improve cholesterol levels in people who are slightly overweight.
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.
Quantify the overall effect of B. breve B-3 on fat mass and lipid markers across studies.
A meta-analysis of RCTs using B. breve B-3 at 2–5 × 10^10 CFU/day for ≥8 weeks in adults with BMI ≥25, reporting changes in fat mass, TG, and HDL, with at least 3 studies and 150 total participants.
Establish causal effects of B. breve B-3 on body fat and lipid metabolism.
A double-blind RCT of 250 preobese adults (BMI 25–30) randomized to B. breve B-3 (5 × 10^10 CFU/day) or placebo for 12 weeks, measuring fat mass via DEXA, fasting TG, HDL, and liver enzymes as primary outcomes.
Assess long-term associations between B. breve B-3 use and metabolic health.
A 2-year prospective cohort of 1,500 adults tracking B. breve B-3 supplement use and annual changes in body composition and lipid profile, adjusting for diet and physical activity.
Identify current associations between B. breve B-3 use and metabolic markers.
A cross-sectional study of 2,000 adults assessing current use of B. breve B-3 and measuring BMI, waist circumference, and lipid panel.
Summarize existing evidence and propose mechanisms.
A narrative review discussing the clinical and preclinical evidence for B. breve B-3 in metabolic health, including proposed mechanisms of action.