# Lactobacillus gasseri BNR17 **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/lactobacillus-gasseri-bnr17 **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-18 **Evidence Score:** 8 / 10 **Category:** Fermented/Probiotic **Also Known As:** Lactobacillus gasseri strain BNR17, L. gasseri BNR17, LG-BNR17, Gasseri BNR17, BNR-17 strain, Lactobacillus gasseri BNR-17 ## Overview Lactobacillus gasseri BNR17 is a clinically studied probiotic strain that produces bacteriocins and short-chain fatty acids to support weight management and metabolic health. This strain specifically targets visceral fat reduction and enhances gut barrier function through modulation of the [gut microbiome](/ingredients/condition/gut-health). ## Health Benefits - Supports weight management by reducing body fat, enhancing metabolic health. - Promotes healthy gut flora and [digestion](/ingredients/condition/gut-health), improving nutrient absorption. - May reduce waist circumference by 2% in 12 weeks, aiding in body shaping. - Enhances [immune function](/ingredients/condition/immune-support) by boosting antibody production, reducing illness risk. - Reduces [inflammation](/ingredients/condition/inflammation) by modulating cytokine levels, promoting overall wellness. - Improves cholesterol levels by breaking down fats, supporting heart health. - Boosts mood by producing [serotonin](/ingredients/condition/mood), enhancing mental well-being. ## Mechanism of Action Lactobacillus gasseri BNR17 produces bacteriocins that inhibit pathogenic bacteria while generating butyrate and acetate short-chain fatty acids that strengthen [intestinal barrier integrity](/ingredients/condition/gut-health). The strain modulates the gut-brain axis by influencing GLP-1 secretion and leptin sensitivity, which helps regulate appetite and fat [metabolism](/ingredients/condition/weight-management). It also enhances bile acid metabolism, promoting lipid breakdown and reducing visceral fat accumulation. ## Clinical Summary Clinical trials with Lactobacillus gasseri BNR17 have shown significant weight management benefits in controlled studies. A 12-week randomized trial demonstrated a 2% reduction in waist circumference among participants taking the [probiotic](/ingredients/condition/gut-health) supplement. Additional studies indicate improvements in body fat percentage and metabolic markers, though most research involves relatively small sample sizes of 50-100 participants. The evidence suggests consistent but modest effects on weight management when combined with standard dietary approaches. ## Nutritional Profile - Produces lactic acid, aiding in gut health. - Contains enzymes that facilitate [digestion](/ingredients/condition/gut-health). - Contributes to the production of beneficial short-chain fatty acids. ## Dosage & Preparation Typically taken in doses of 1-10 billion CFUs per day. Available in capsule or powder form. Consult a healthcare provider before use. ## Safety & Drug Interactions Lactobacillus gasseri BNR17 is generally well-tolerated with minimal side effects, though some individuals may experience mild digestive symptoms like bloating or gas during initial use. No significant drug interactions have been reported, but individuals taking immunosuppressive medications should consult healthcare providers before use. The strain appears safe for healthy adults, but pregnant and breastfeeding women should seek medical advice before supplementation. People with severe immune compromise or active gastrointestinal infections should avoid [probiotic](/ingredients/condition/gut-health) supplementation. ## Scientific Research Several randomized controlled trials have demonstrated its efficacy in weight management and gut health. Emerging studies suggest benefits for metabolic health. ## Historical & Cultural Context Lactobacillus gasseri BNR17 has been extensively studied in Korea and Japan for its potential in weight management and gut health. ## Synergistic Combinations Green Tea Extract, Fiber, Chromium ## Frequently Asked Questions ### How much weight loss can I expect from Lactobacillus gasseri BNR17? Clinical studies show modest but consistent results, with participants experiencing approximately 2% waist circumference reduction over 12 weeks. Individual results vary significantly based on diet, exercise, and baseline metabolic health. ### What is the recommended dosage for Lactobacillus gasseri BNR17? Most clinical studies used doses ranging from 1-10 billion CFU daily taken with meals. The optimal dosage appears to be around 5 billion CFU daily for weight management benefits, though individual needs may vary. ### Can I take Lactobacillus gasseri BNR17 with other probiotics? Yes, this strain can generally be combined with other probiotic strains safely. Multi-strain formulations may provide broader digestive benefits, though individual strains like BNR17 offer more targeted weight management effects. ### How long does it take to see results from Lactobacillus gasseri BNR17? Initial digestive improvements may occur within 2-4 weeks, while significant weight management benefits typically become apparent after 8-12 weeks of consistent use. Continued supplementation maintains these metabolic benefits. ### Does Lactobacillus gasseri BNR17 need refrigeration? Refrigeration helps maintain maximum potency and extends shelf life, though many commercial formulations are shelf-stable at room temperature. Check specific product labeling for storage requirements to ensure optimal bacterial viability. ### Is Lactobacillus gasseri BNR17 safe during pregnancy and breastfeeding? Lactobacillus gasseri is generally considered safe during pregnancy and breastfeeding, as it is a naturally occurring probiotic strain. However, pregnant and nursing women should consult their healthcare provider before starting any new supplement, including BNR17, to ensure it is appropriate for their individual health circumstances. Most clinical studies on this strain have focused on non-pregnant populations, so personalized medical guidance is recommended. ### Does Lactobacillus gasseri BNR17 interact with antibiotics or other common medications? Lactobacillus gasseri BNR17 may be reduced in effectiveness when taken simultaneously with antibiotics, as antibiotics can kill beneficial bacteria. It is generally recommended to separate probiotic supplementation from antibiotic doses by at least 2–3 hours, or ideally wait until the antibiotic course is finished before resuming. For other medications, BNR17 is not known to have major direct interactions, but consulting with a healthcare provider or pharmacist is advisable for personalized guidance. ### What does research show about Lactobacillus gasseri BNR17's effectiveness compared to other weight management probiotics? Clinical studies on Lactobacillus gasseri BNR17 specifically have shown measurable results, including reductions in waist circumference (approximately 2% in 12 weeks) and body fat percentage. While other probiotic strains like Lactobacillus plantarum and Lactobacillus rhamnosus also support weight management, BNR17 has demonstrated particular efficacy in reducing visceral fat and enhancing metabolic markers. The evidence for BNR17 is considered moderate-to-good quality, with peer-reviewed studies supporting its use as part of a comprehensive weight management program. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*