Lactobacillus Gasseri for Weight Management

Research suggests that certain strains of Lactobacillus gasseri may support weight management goals, with one 2018 review of clinical and preclinical trials finding strain-specific evidence for weight reduction and anti-inflammatory effects, particularly when combined with prebiotic fibers that promote short-chain fatty acid production. The available evidence base here is limited to a review article and a 2025 mouse study examining meal timing and gut circadian rhythms, the latter of which did not directly study Lactobacillus gasseri but raises the broader point that when food is consumed may influence the gut environment in which any probiotic operates. Studies indicate that benefits appear highly dependent on the specific bacterial strain used, meaning findings from one Lactobacillus gasseri strain may not generalize to others. Overall, the evidence is preliminary and largely preclinical or review-based, and more direct human trials would be needed to draw firm conclusions about the role of Lactobacillus gasseri in weight management.