Short Wave Why U.S. Sunscreens Don't Measure Up
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Aug 29, 2025 Michelle Wong, a chemist and science communicator with a PhD in chemistry, dives into the effectiveness of U.S. sunscreens compared to those from Korea and Europe. She discusses the significant gaps in UV protection standards, exposing how U.S. regulations lag behind in approving effective ingredients. Wong emphasizes the importance of broad spectrum protection and offers practical tips for maximizing sun safety, including proper application methods and the use of UV-blocking clothing. Tune in to learn how to make informed choices for your skincare!
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Regulatory Classification Shapes Sunscreen Options
- The US classifies sunscreen as a drug while many other places treat it as a cosmetic.
- That classification enforces stricter standards and slower ingredient changes in the US.
UVA Matters As Much As UVB
- UVA and UVB both increase skin cancer risk but act differently in the skin.
- UVA penetrates deeper and contributes to melanoma and premature aging despite lower energy.
Broad-Spectrum Rules Vary Internationally
- The U.S. broad-spectrum standard uses critical wavelength but not the stricter UVA-to-SPF ratio required elsewhere.
- Other regions require UVA protection to be at least one third of the SPF, giving stronger UVA coverage.