Astaxanthin is a red carotenoid pigment derived primarily from the microalga Haematococcus pluvialis, valued in topical skincare for its potent free-radical scavenging activity. It is studied for protecting skin against oxidative and UV-induced damage, supporting elasticity, and reducing signs of photoaging.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin staining or yellow/orange tint | Uncommon | Due to its intense natural pigment, especially at higher concentrations. |
| Skin irritation or redness | Rare | Mild, typically transient and formulation-dependent. |
| Allergic contact dermatitis | Very rare | Possible in individuals sensitive to algae-derived or carotenoid ingredients. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.