Eli5 explain how sunscreen works

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Additionally, does sunscreen block the benefits from the sun? Can you still get a tan?

In: Chemistry

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Well you can still tan but high spf sun screens won’t let you. Basically they work one of two ways. The first is by reflecting uv (the type of light that causes tanning and burning) or by absorbing it and turning it into heat. The more effective the sunscreen the less I’ve gets through to hit you.

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