Red 6 (D&C Red No. 6) is a synthetic azo dye used to impart red color in cosmetics such as lipsticks, blushes, and other makeup products. It functions purely as a colorant and provides no therapeutic skin benefit.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Rare | Occasional sensitization reported, mainly from lip and facial cosmetics. |
| Skin irritation or redness | Rare | Mild localized irritation in sensitive individuals. |
| Contact cheilitis (lip inflammation) | Very rare | Reported in association with pigmented lip products. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.