We asked a dermatologist to break down just how often you should be shampooing your hair.

Shampoo is a cleansing agent. It contains ingredients called surfactants and detergents that help remove oil, sweat, dirt, product buildup, and environmental pollutants from your hair. Conditioners, ...

Emily Laurence is a journalist, freelance writer and certified health coach living in Raleigh, North Carolina. She specializes in writing about mental health, healthy aging and overall wellness. For ...