Lactobacillus gasseri

What it is

Lactobacillus gasseri is a key indigenous human probiotic bacterium colonising the gastrointestinal and urogenital tracts. Produced through anaerobic fermentation and gentle freeze-drying, L. gasseri produces unique bacteriocins (gasserins) and organic acids. Formulated in Velobiotics supplements, live L. gasseri cells are encased in patented MEP microencapsulation, ensuring protection against gastric acid and bile degradation for reliable delivery to the lower gut and vaginal mucosa.

Also known as: L. gasseri

What it does

• Supports healthy body weight and reduction of visceral fat.
• Promotes balanced vaginal microbial ecology and optimal pH.
• Inhibits undesirable bacterial colonization through gasserin bacteriocin production.
• Eases occasional digestive distress and abdominal bloating.

Amplified by probiotics

Lactobacillus gasseri acts as a potent metabolic regulator within multi-strain probiotic blends. By fermenting complex sugars into lactic acid, L. gasseri decreases intestinal pH, favoring the proliferation of beneficial Bifidobacteria while suppressing pathogenic organisms. L. gasseri secretes specialized bacteriocins and conjugated linoleic acid (CLA) precursors that influence host lipid metabolism and adipocyte size regulation. When co-administered with Lactobacillus rhamnosus, L. gasseri enhances epithelial cell adhesion and upregulates mucin production, reinforcing the gut mucosal barrier. Shielded by Velobiotics MEP microencapsulation during gastric transit, intact L. gasseri organisms reach the intestine to modulate inflammatory signaling and promote optimal nutrient utilization.

Typical dose

1–10 billion CFU/day

The evidence

Multiple double-blind, randomized controlled trials demonstrate that Lactobacillus gasseri supplementation significantly reduces visceral fat area, waist circumference, and body weight in overweight adults. Clinical evidence also confirms its efficacy in restoring vaginal flora balance. (Tanihiro R 2026, Front Nutr) (Perez M 2025, Microbiol Spectr) (Choi JH 2026, Probiotics Antimicrob Proteins)

1. Tanihiro R, et al. Effects of heat-treated Lactobacillus gasseri CP2305 on brain oscillatory activity and mental stress in healthy adults: a double-blind, randomized, crossover, placebo-controlled trial. Front Nutr. 2026;13:1796729 PubMed ↗
2. Perez M, et al. Lactobacillus gasseri CECT 30648 shows probiotic characteristics and colonizes the vagina of healthy women after oral administration. Microbiol Spectr. 2025;13:e0021125 PubMed ↗
3. Choi JH, et al. A Randomized, Double-Blind, Placebo-Controlled Study on Probiotic Treatment for Halitosis: Novel Insights into Glucose and Phosphorus Metabolism. Probiotics Antimicrob Proteins. 2026;18:1722-1735 PubMed ↗

Safety & who should check first

Lactobacillus gasseri is safe, non-pathogenic, and well tolerated in clinical trials. It displays an excellent safety record with no adverse effects reported on metabolic or gastrointestinal parameters.