In theory, SPF 50 and SPF 100 are very similar sunscreens: one blocks 98 percent of UVB rays, and the other blocks 99 percent. The problem is, nobody applies the amount of sunscreen that will get you the SPF listed on the bottle. So in reality you’re getting very different protection out of those two bottles.
mardi 1 mai 2018
Lifehacker
High SPF Sunscreens Really Are Better
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