Probiotics Show Potential in Weight Management, Experts Say
Recent research suggests certain probiotic strains may aid in weight loss by influencing gut bacteria and metabolic processes, though experts caution they are not a standalone solution.
Probiotics are microorganisms that support beneficial bacteria throughout the body, particularly in the intestines, aiding digestion, immunity, and potentially weight management. “Good bacteria can support health and immune function by helping our body digest food, produce vitamins, break down and absorb medications, and prevent overgrowth of bad bacteria that can make us sick,” explains Katherine Saunders, MD, an obesity medicine physician. Gut microbes play a role in absorbing nutrients, stabilizing blood sugar, and triggering fullness, impacting appetite and cravings.
A 2024 review in Obesity Science and Practice found that specific strains, Bifidobacterium and Lactobacillus, were associated with reductions in body weight, BMI, waist circumference, and total body fat—even without dieting. However, experts emphasize the need for further study, noting that a healthy diet likely contributes significantly to a healthy gut. “It may certainly be that those people who eat healthy have healthier guts and not the other way around,” says Caroline Apovian, MD, co-director of weight management and wellness at Brigham and Women’s Hospital. Understanding the gut microbiome is increasingly important as obesity rates continue to rise globally, according to the World Health Organization.
While supplements are available, experts recommend prioritizing probiotic-rich foods. When considering supplements, look for third-party certifications like NSF or USP, and focus on clinically studied strains such as Akkermansia muciniphila, lactobacillus gasseri, lactobacillus rhamnosus, and bifidibacterium. Roxana Ehsani, RD, cautions that individuals with compromised immune systems or certain gastrointestinal conditions should consult a doctor before use. For more information on gut health, see Mayo Clinic’s guide to probiotics.
Health officials continue to emphasize that probiotics are best integrated into a balanced diet and lifestyle, and individuals should consult with their healthcare provider before starting any new supplement regimen.
