With the summer around the corner, I thought it would be a good idea to look at what sunscreens actually are and do. We are supposed to apply it over our whole body and multiple times a day, so the ingredients in sunscreen should not be irritating or cause skin allergies. 

First let's look at the two kinds of sun blockers. The first one is the physical kind, like zinc and titanium dioxide, and the second is the chemical kind, like oxybenzone, avobenzone, octisalate, octocrylene, homosalate and octinoxate.

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