Sunscreens can break down

A new medical study, conducted by Environmental Working Group (EWG), a Washington-based nonprofit, looked at over 400 peer-reviewed articles on sunscreen ingredients.

It found that many of the most popular sunscreens break down quickly in the sun or are not blocking many harmful ultraviolet (UV) rays. Be sure to read the ingredients and check reviews of sunscreen products before relying on them for UV protection.
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