Octisalate
Ingredient Info
Octisalate is a chemical UV filter used in sunscreens to absorb ultraviolet (UVB) light and help protect skin from sun damage. It works by converting UV rays into heat that dissipates from the skin.
Benefits
- Provides UVB sun protection
- Lightweight and less visible on skin than mineral filters
- Compatible with many other skincare ingredients
Potential concerns
- Systemic absorption detected in blood after single application; all participants exceeded FDA's 0.5 ng/mL threshold on day 1
- Long-term health effects of systemic absorption remain unclear and require further study
- May cause skin irritation or allergic contact dermatitis in sensitive individuals
Science: A 2020 FDA-led clinical trial found that octisalate is absorbed systemically into the bloodstream after topical sunscreen application, with measurable plasma concentrations exceeding regulatory thresholds. The long-term safety implications of this absorption are not yet fully established, and additional research is ongoing.
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