Hydrolyzed Yeast Protein is a yeast-derived protein broken into smaller peptides and amino acids, used in skincare for its skin-conditioning, moisturizing, and film-forming properties. It can help improve skin hydration and surface smoothness.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation (redness, stinging) | Rare | Generally well tolerated; mild irritation possible in sensitive skin. |
| Allergic contact dermatitis | Rare | Protein hydrolysates can occasionally act as sensitizers in predisposed individuals. |
| Hypersensitivity in those with yeast allergy | Very rare | Theoretical risk for individuals with known yeast sensitivities. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.