Corthellus (Lentinula edodes/Shiitake) mushroom extract is used in skincare for its content of polysaccharides, kojic acid, and antioxidant compounds, offering soothing, brightening, and conditioning effects. It is often included to support skin tone evenness and provide mild antioxidant protection.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation or mild redness | Uncommon | Possible in sensitive skin, generally transient. |
Allergic contact dermatitis | Rare | Reported in individuals sensitized to mushrooms or fungal proteins. |
Shiitake dermatitis (flagellate erythema) | Very rare | Primarily associated with dietary intake of raw shiitake; rarely linked to topical use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.