Benzophenone-3 (oxybenzone) is a broad-spectrum chemical UV filter that absorbs both UVB and short UVA radiation, commonly used in sunscreens and as a photostabilizer in cosmetic formulations. It also helps protect product integrity by preventing UV degradation of other ingredients.
| Reported effect | How often | Notes |
|---|---|---|
Contact and photocontact allergic dermatitis | Uncommon | One of the more frequently reported photoallergens among UV filters, causing rash, redness, or itching, sometimes only upon sun exposure. |
Skin irritation or stinging | Uncommon | Mild transient irritation, more likely on sensitive skin or near the eyes. |
Systemic absorption | Common | Detectable in blood and urine after topical use; clinical significance is uncertain and under ongoing study. |
Possible endocrine activity | Rare | Weak hormonal effects observed in laboratory and animal studies; relevance to humans at typical exposure remains unproven. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.