A filtrate or lysate from fermenting Saccharomyces yeast, containing low-molecular-weight nutrients and metabolites. It's used to improve product feel and radiance perception and to offer antioxidant support, though evidence is mixed.
May promote a smoother look and subtle glow while providing light antioxidant support, though evidence is mixed and formula-dependent. Helps skin feel softer and more supple.
Uses In Skincare & Cosmetics
Frequently found in essences, ampoules, toners, sheet masks, and lightweight moisturizers.
Comedogenic Rating
This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.
Safety
Generally well tolerated, yet fermented filtrates may cause mild stinging or irritation, particularly on sensitized or barrier-impaired skin. Patch test if you're prone to reactions with ferment-based products.
Is Saccharomyces Ferment a Good Ingredient?
Fair, because it may improve feel and the perception of radiance, but strong clinical support is mixed and results vary by fermentation process and concentration. Fermented yeast components can also irritate sensitive skin in some users.