Red 7 Lake is an insoluble pigment form of the synthetic azo dye Red 7, created by combining the dye with a metal salt (typically calcium) to fix it onto a substrate. It is used to impart red shades in cosmetics such as lipsticks, blushes, and nail products.
| Reported effect | How often | Notes |
|---|---|---|
| Contact dermatitis / skin irritation | Rare | Occasional localized redness or irritation reported, mainly in sensitive individuals. |
| Allergic contact sensitization | Rare | Azo dyes may cause allergic reactions in predisposed individuals, including those sensitized to related dyes. |
| Cheilitis from lip products | Very rare | Inflammation of the lips occasionally linked to pigmented lip cosmetics. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.