Silymarin is a flavonolignan complex extracted from milk thistle (Silybum marianum) used in topical skincare for its antioxidant and anti-inflammatory properties. It helps neutralize free radicals, may reduce UV-induced oxidative damage, and is studied for soothing and protective effects.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation (mild redness, stinging) | Uncommon | Typically transient and related to formulation or concentration. |
| Allergic contact dermatitis | Rare | More likely in individuals sensitive to Asteraceae/Compositae plants (ragweed, chrysanthemum). |
| Itching or localized rash | Rare | Reported occasionally in sensitive skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.