SPF 30 vs SPF 50: What the Numbers Actually Mean
SPF 30 blocks 96.7% of UVB and SPF 50 blocks 97.9% - so why the amount you actually apply matters far more than the number you buy.
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SPF 30 blocks 96.7% of UVB and SPF 50 blocks 97.9% - so why the amount you actually apply matters far more than the number you buy.