Probiotic Yeast for Gut and Immune Health

Lynside® S. boulardii is a proprietary, patented probiotic yeast strain, registered by Lesaffre as Saccharomyces cerevisiae var. boulardii CNCM I-3799. Backed by over 70 clinical studies and more than 65 years of documented use, it is recognised as one of the most extensively researched probiotic yeasts, positioned within the digestive and immune health segment of the nutraceutical market.

As a yeast-based probiotic, Lynside® S. boulardii differs structurally from bacterial probiotics: its eukaryotic cell wall confers natural resistance to gastric acid and bile salts, allowing it to reach the intestine without protective encapsulation. Unlike bacterial strains, it remains fully active during antibiotic therapy, since antibiotics target bacterial cell functions that the yeast does not share. Its action is transient rather than colonizing, clearing from the gastrointestinal tract within 3 to 5 days after intake stops, supporting the gut’s natural microbial balance without permanent implantation.

Lynside® S. boulardii is manufactured to consistent quality standards, is Non-GMO, gluten-free, lactose-free, and suitable for Kosher, Halal, vegetarian and vegan formulations, with a shelf life of 3 to 5 years at ambient temperature, among the most stable probiotic yeasts on the market. Available in rod-shape (vermicelli) and powder formats, it integrates readily into capsules and sachets.

Falling within the Probiotics & Postbiotics category, Lynside® S. boulardii is positioned as a science-backed, single-strain yeast ingredient for manufacturers developing digestive health, antibiotic-compatible, and immune support nutraceutical formulations.

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