Sunscreen should protect against UVA and UVB rays to avoid sunburn and aging. SPF, or sun protection factor, only refers to how much UVB sunscreen pro. … When it comes to sun safety , the line between science and hype is thinner than ever. Luckily, if you want to protect your skin from aging and reduce your risk of melanoma, there are actually only a few things to know when buying and using sunscreen . Look for sunscreens that block both UVA and UVB rays. …
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Sunscreen and SPF: What You Really Need to Know
