Save Your Skin: Common Sunscreen Myths, Debunked

Windows Don’t Block Out The Sun

When you’re inside or in the car, you don’t need sunscreen–right? Wrong. Standard windows can block some UVB rays, but not UVA rays, says dermatologist Joyce Park. UVA rays dig deeper into the skin and can do just as much damage as UVB, if not more.

Dermatologist Harold Lancer gave CNN a quick tip: If you can see where you’re walking without a flashlight, you need sunscreen. Natural light can still damage your skin in large quantities. If you sit next to a window, even in the car, you need to apply sunscreen first.

Stay tuned to learn why you should wear sunscreen on cloudy days.