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QUATREFLORA™ BIOTIC
Provided by Gnosis By Lesaffre
About
Quatreflora™ is a proprietary, patented probiotic yeast strain used in nutraceutical applications, developed by Lesaffre for women’s intimate and vaginal health support through an oral, gut-to-vagina mode of action.
Key Benefits:
• Registered strain Saccharomyces cerevisiae CNCM I-3856, backed by 2 clinical studies and 3 preclinical (in vivo) studies
• Demonstrated migration from the intestine to the vaginal environment following oral administration, detected in vaginal samples in a dedicated clinical study, enabling a dual gut and vaginal mode of action from a single oral intake
• Positioned for vaginal microbiota balance, antifungal support against Candida albicans, antibacterial activity against Gardnerella vaginalis, and reduction of recurrence of vaginal infections (vulvovaginal candidiasis, bacterial vaginosis)
• Convenient oral administration format as an alternative to local vaginal care routines, supporting better compliance
• Yeast-based probiotic format: naturally resistant to gastric acid and bile salts, unaffected by antibiotic therapy, no protective encapsulation required
• EU QPS status, non-GMO, gluten-free, lactose-free, suitable for Kosher, Halal, vegetarian and vegan diets
• Available in two grades: SPI (rod-shape/vermicelli) and PW (powder), both easy to formulate into capsules or sachets
• Recommended dosage: 2.5 billion CFU/day (1 to 2 capsules), corresponding to 320 mg of commercial product per day
• Shelf life: 24 months in original vacuum-sealed packaging, stored cool (<25°C) and dry (<60% RH)
• Produced by Gnosis by Lesaffre and distributed by Safic-Alcan
Typical Applications:
Vaginal probiotic / intimate health yeast / feminine microbiota support ingredient for nutraceutical formulations targeting vaginal comfort, recurrent intimate discomfort, and microbiota balance for women. Suitable for capsules, sticks and sachets[HJ4.1]. Complementary ingredient for women’s health product lines addressing broader life-stage needs (fertility, pregnancy, menopause, healthy aging), and for combination formulas alongside digestive-comfort probiotic yeasts such as Lynside® Pro SCB, subject to compatibility testing.
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About gnosis by lesaffre
For over 30 years, Lesaffre has been involved in Human Health & Nutrition as part of its ambition to Better Nourish and Protect the Planet. In November 2018, Lesaffre acquired Gnosis Advanced Biotech and officially combined it with Lesaffre Human Care to form a new Business Unit named Gnosis by Lesaffre. At Gnosis by Lesaffre, we are committed to cultivating and to delivering nutritional actives, probiotics, and nutritional and functional yeasts that benefit human health and wellbeing, thanks to the power of microorganisms and biotransformation processes like fermentation. Put differently, we explore life to improve living. Our vision: At Gnosis by Lesaffre, we strive for a world that moves better, digests better, ages better, feels better, and, ultimately, lives better thanks to microorganisms and biotransformation.

Probiotic Yeast for Vaginal and Intimate Health
Quatreflora™ is a proprietary, patented probiotic yeast strain, registered by Lesaffre as Saccharomyces cerevisiae CNCM I-3856. Backed by 2 clinical studies and 3 preclinical (in vivo) studies, it is positioned within the women’s intimate health segment of the nutraceutical market, supporting vaginal microbiota balance through an oral route of administration.
As a yeast-based probiotic, Quatreflora™ 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, and leaves it unaffected by concurrent antibiotic therapy. Following oral intake, the strain has been shown to migrate from the intestine to the vaginal environment, enabling a dual mode of action, an early antipathogenic effect in the gut alongside local support at the vaginal site, from a single convenient format.
Quatreflora™ is manufactured to consistent quality standards, holds EU QPS status, is Non-GMO, gluten-free, lactose-free, and suitable for Kosher, Halal, vegetarian and vegan formulations, with a shelf life of 18 to 24 months depending on grade, stored under vacuum in a cool, dry place. Available in SPI (vermicelli) and PW (powder) grades, it integrates readily into capsules and sachets.
Falling within the Probiotics & Postbiotics category, Quatreflora™ is positioned as a science-backed, single-strain yeast ingredient for manufacturers developing vaginal care, intimate microbiota, and women’s health nutraceutical formulations.