MUNDANE MYSTERIES: What does the SPF number on Sunscreen actually mean?

Question mark drawn by sunscreen on a male back, skin protection concept

MUNDANE MYSTERIES: What does the SPF number on Sunscreen actually mean?

With this mini heat wave over the weekend I feel like a lot of people got caught off guard and woke up with quite the sunburn today.

Anytime you reach for that sunscreen you have to check the SPF. But what does that SPF number actually mean?

The SPF number tells you how long the sun’s UV radiation would take to make your skin that painful red if you have the sunscreen on versus the amount of time it would take without sunscreen. So for example, with SPF 30 it would take you 30 times longer to burn your skin than if you weren’t wearing the sunscreen.

I’m usually always reaching for at least 50 SPF. Stay cool out there this summer!

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