How is lactic acid used to treat skin?

Lactic acid is very effective for dry skin; it gently exfoliates dead skin cells and it's also a great humectant. In this video, dermatologist Doris Day, MD, explains how lactic acid is used to treat skin and how to find it in skincare products.

Necrotizing fasciitis is a dangerous infection that can start suddenly and move fast. Spot the signs and know how to respond.

These six possible causes of hair loss may surprise you.

Necrotizing fasciitis is a dangerous infection that can start suddenly and move fast. Spot the signs and know how to respond.

Find out what happens if you neglect to wash your face.

Learn the best places to safely stash vitamins and supplements—and recognize when it’s time to dispose of them.