Malachite extract is a copper-based mineral (copper carbonate hydroxide) derivative used in cosmetics primarily as an antioxidant and skin-conditioning agent, often promoted for detoxifying and free-radical protection claims. Its bioavailable copper content is thought to support enzymatic antioxidant activity, though robust clinical evidence is limited.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Transient erythema or stinging, typically in sensitive skin or at higher concentrations. |
Allergic contact dermatitis | Rare | Sensitization to copper-containing compounds has been documented in some individuals. |
Temporary greenish skin discoloration | Rare | Due to the natural green copper pigment, usually cosmetic and washes off. |
Systemic copper toxicity | Very rare | Not expected from normal topical use; theoretical concern only with extreme overuse or compromised skin barrier. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.