Wearing sunscreen in winter may not seem essential, but the UV rays are just as strong (or stronger) on snowy slopes Certain populations, like seasoned outdoor sports fans, are likely well aware ...

According to the AAD, a sunscreen with SPF 30 blocks approximately 97% of the sun’s UVB rays. But the CDC stresses that reapplication is essential.

According to the AAD, a sunscreen with SPF 30 blocks approximately 97% of the sun’s UVB rays. But the CDC stresses that reapplication is essential.

Many individuals only apply about 20%–50% of the amount of sunscreen needed to achieve the amount of SPF on the label, the AAD says. "An adult needs one ounce of sunscreen, which is about a shot ...