The Orange County Register [registration required] teamed with the Skin Cancer Foundation to explain sunscreen labels. Before you go to Costco and purchase a pallet of sunscreen for summer, it's important to know what you're buying.
In brief, the article discusses the two main types of ultraviolet radiation that hurts our skin--UVA and UVB. UVB rays will damage the top layer of skin, while UVA penetrates deep. On a sunscreen bottle, SPF (sun protection factor) measures the time the sunscreen protects against UVB, but not UVA. To get a sunscreen that protects against both UVA and UVB rays look for these ingredients: Octocrylene, titanium dioxide and zinc oxide. More tips are available in the article.
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