Does a higher SPF provide more sun protection?

When it comes to the SPF level in sunscreen, a higher number doesn't always mean better protection. In this video dermatologist Dr. Ellen Marmur explains why.

How does sunscreen protect your skin? Learn the facts about SPF, UVA, and UVB rays, broad-spectrum sunscreens, and more.

Top dermatologists share their wisdom on ingredients and SPF levels—plus how much to use, how often to reapply, and more.

Even better than treating psoriasis is preventing a flare-up in the first place. Here’s how.

Here’s how to use everyday cleaners safely and correctly to ward off germs.

Get the dirt on what causes allergies and asthma.