Skin Conditioning
HYDROLYZED YEAST
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Yeast (typically Saccharomyces) broken down enzymatically or mechanically into peptides, amino acids and beta-glucans. A well-established conditioning ingredient.
Hydrolyzed yeast is produced by autolysis or enzymatic digestion of yeast (usually Saccharomyces cerevisiae) to release soluble peptides, amino acids, nucleotides and polysaccharides (notably beta-glucan and mannans). It is used in skin and hair care for conditioning, soothing and marketed as a microbiome-supportive ingredient. CIR and industry panels have assessed yeast-derived ingredients favourably at cosmetic use levels; no EU restrictions. Yeast-allergic or candida-sensitive users are a rare but valid consideration. Composition varies meaningfully between suppliers.
Function
Skin benefits
- Delivers amino acids, peptides and beta-glucan
- Skin conditioning and soothing
- Long safety record in skincare
Known concerns
- Residual yeast components may sensitize yeast-allergic users
- Variable composition between suppliers
- Marketing claims often out-run clinical data
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related skin conditionings
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.