Lactobacillus gasseri
What it is
A naturally dominant species in healthy vaginal and gut microbiomes with the most consistent weight-management evidence of any probiotic strain. The Kadooka et al. trials (2010 Br J Nutr, 2013 Eur J Clin Nutr) using L. gasseri SBT2055 found 4–5% reductions in visceral fat and waist circumference after 12 weeks. Noteworthy caveat: nearly all positive SBT2055 evidence comes from a single research group (Snow Brand Milk / Megmilk), so independent replication is still limited. Also colonises the vaginal epithelium and reduces bacterial vaginosis recurrence in multiple trials. In H. pylori triple eradication therapy, adding L. gasseri significantly reduces antibiotic side effects and improves eradication rates.
Dose
10⁹–10¹⁰ CFU/day of L. gasseri SBT2055 or equivalent identified strain; taken with a meal for best survival
Time of day & tips
Take with food to improve survival through stomach acid. Refrigerate if label requires it. Look for specifically identified L. gasseri strains — generic blends may not contain this species at adequate quantities. Consistent daily use for at least 4 weeks before assessing results.
Cycling
Safe for continuous daily use. Vaginal colonisation requires ongoing supplementation to maintain. Visceral fat effects were sustained only while taking the supplement and reversed on discontinuation.
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