Bixa Orellana (annatto) seed extract is a plant-derived ingredient rich in carotenoids such as bixin and norbixin, used in cosmetics primarily as a natural colorant and antioxidant. It can impart a yellow-orange tint and provides some free-radical scavenging activity.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Rare | Hypersensitivity reactions to annatto are documented, mainly from ingested forms but possible topically. |
| Skin irritation | Rare | Mild redness or irritation reported in sensitive individuals. |
| Temporary skin staining | Uncommon | The carotenoid pigments can transiently tint the skin yellow-orange. |
| Urticaria/contact hives | Very rare | Isolated reports of immediate-type reactions in susceptible people. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.