Spending too much time in the sun is the biggest outside cause of wrinkles and aged-looking skin—more sun means more damage, and longer exposure makes it worse.

Wearing sunscreen and staying out of the sun too much can help keep your skin looking younger by preventing wrinkles and sun spots.

The more sun you’ve been in over your whole life, the more wrinkles you’ll likely have on your face as you get older—and guys tend to have more wrinkles than women.

Spending too much time in the sun over a long period can throw off your skin's natural daily clock.

If you put on sunscreen every single day for almost five years, your skin will age about 24% slower than if you only use it sometimes—think fewer wrinkles and sun spots.

Putting on sunscreen every day can stop your skin from getting worse from sun damage, and might even help fix some of the wrinkles and spots you already have.