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SPF 50 vs SPF 100: Is Higher SPF Actually Better?

SPF 100 doesn't block twice as much UV as SPF 50 — here's what the numbers actually mean Do you reapply sunscreen throughout the day or just put it on once?

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SPF 100 doesn't block twice as much UV as SPF 50 — here's what the numbers actually mean Do you reapply sunscreen throughout the day or just put it on once?

Transcript

SPF 100 — twice the protection, right? SPF measures the fraction of UV rays that still reach your skin. SPF 50 blocks about 98% of UVB — SPF 100 blocks roughly 99%. One percent difference. Follow for more science they never taught you.