Choosing and using sunscreen When choosing sunscreen, be sure to read the label before you buy. Sunscreens with broad spectrum protection (against UVA and UVB rays) and with SPF 30 or higher are recommended. The SPF number is the level of protection the sunscreen provides against UVB rays. Higher SPF numbers do mean more protection, but the higher you go, the smaller the difference becomes. SPF 15 sunscreens filter out about 93% of UVB rays, while SPF 30 sunscreens filter out about 97%, SPF 50 sunscreens about 98%, and SPF 100 about 99%. No sunscreen protects you completely. For best results, most sunscreens must be reapplied at least every 2 hours and even more often if you are swimming or sweating. Products labeled “waterproof” may provide protection for at least 80 minutes even when you are swimming or sweating. Products that are “water resistant” may protect for only 40 minutes. Sunscreen usually rubs off when you towel yourself dry, so you will need to put more on. Remember to check the expiration date on the sunscreen container to be sure it is still effective.
Posted on: Sat, 29 Jun 2013 02:10:00 +0000
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