FDA approves a well-known sunscreen ingredient—finally

The FDA has approved a new sunscreen ingredient—the first in more than two decades. But here's the catch: it's already been used safely in sunscreen formulations around the world for years. According to Science Friday, this long-delayed approval raises questions about why such an ingredient took so long to clear American regulatory hurdles, even as it proved its track record globally. The approval could expand options for sun protection in the U.S. market.

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