Lactobacillus gasseri
Lactobacillus gasseri SBT2055
LG2055 (SBT2055)
Reducing visceral fat and supporting a healthy body composition.
Quick Overview
At a Glance
Researched Benefits
- Clinically tested in humans with CT-confirmed reductions in deep belly fat — not just scale weight
- Supports healthy blood sugar levels and may help the body burn calories more efficiently
- Helps protect the gut lining and cool down inflammatory activity throughout the digestive tract
- One of the most thoroughly studied probiotic strains for metabolic health, with over two decades of published research
Usage & Application
Clinically Studied Dosage
100–200 Million CFU/day (10⁸ CFU/day) via fermented milk or capsule, taken daily for at least 12 weeks
Available Forms
Clinical Evidence
Visceral Fat and Waistline Support from a Japanese-Studied Probiotic: Lactobacillus gasseri SBT2055
Imagine your gut as a busy city, and Lactobacillus gasseri SBT2055 (often called LG2055 for short) as the city's most effective traffic controller. This friendly bacterium was originally isolated from human intestinal microflora in Japan, making it a naturally 'human-native' probiotic strain — meaning it knows how to navigate our digestive system like a local. What makes LG2055 special is how well it survives the harsh journey through the stomach and small intestine, successfully setting up camp in the gut and staying there long enough to actually make a difference. Scientists believe one of its key superpowers is its ability to physically grip the gut lining using unique adhesion proteins on its surface — think of it as a probiotic with exceptionally good grip socks. Once settled in, it works by blocking the absorption of dietary fats, cooling down gut inflammation, and keeping harmful bacteria from causing trouble.
The most talked-about benefit of LG2055 is its remarkable ability to help reduce visceral fat — that's the deep belly fat that wraps around your internal organs and is notoriously difficult to shift. In multiple rigorous human clinical trials, participants who consumed fermented milk containing LG2055 every day for 12 weeks saw a meaningful reduction in abdominal fat area, as confirmed by CT scans — without making any other changes to their diet or lifestyle. Their waist circumferences shrank, their BMI dipped, and their total body fat decreased compared to people drinking a placebo. The moment participants stopped taking LG2055, the effects began to reverse — which tells us that keeping up with this probiotic is key to maintaining the benefit. Beyond fat reduction, researchers have also found that LG2055 helps improve how the body handles blood sugar. It appears to slow the spike in blood glucose after a meal, boost the body's calorie-burning efficiency, and may even help the pancreas produce insulin more effectively. Think of it like turning up the thermostat on your metabolism while simultaneously helping your body manage the energy it gets from food more gracefully. For people managing cholesterol, there's good news too — animal studies consistently show lower triglyceride and cholesterol levels in those given LG2055, partly because the strain physically interferes with fat absorption in the small intestine.
LG2055 has an excellent safety profile and is generally well-tolerated by healthy adults. It has been consumed in fermented dairy products in Japan for decades without any notable safety concerns, and it is considered suitable for everyday use as a dietary supplement. The most effective and well-studied delivery method is fermented milk (like probiotic yogurt), though capsule and powder formats are increasingly popular and effective. For best results, daily and consistent consumption over at least 12 weeks appears necessary to experience the full benefit — think of it as a long-term wellness habit rather than a quick fix. Beyond its headline acts of fat and metabolic support, LG2055 has shown promise as an immune system ally. Research suggests it may help stimulate immune defenses in the gut lining and could play a role in supporting the body's resistance to seasonal viruses. It may also help protect the gut barrier — the thin wall between your gut contents and your bloodstream — which is increasingly recognized as central to overall health. While people with serious metabolic conditions or immune disorders should always speak with their healthcare provider before starting any probiotic supplement, LG2055 is an excellent option for generally healthy adults looking to support a healthy waistline, balanced blood sugar, and a resilient gut.
Common Questions
Frequently Asked Questions
Sources
Scientific References
Curated By

Clara Hayes
Lead Research Editor
Clara leads the curation and verification of microbiome research for our platform. With extensive experience in translating complex scientific literature into accessible insights, she ensures every strain profile is grounded in peer-reviewed evidence and contextual accuracy.
Medical Disclaimer
The information provided on probioticstrains.com is intended for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Strain profiles and clinical summaries are compiled from published peer-reviewed literature. While we may evaluate or highlight specific commercial formulations, our insights are always grounded in available scientific evidence. Always consult a qualified healthcare provider before starting, changing, or stopping any supplement or health regimen.