Leah Ansell, MD, is a board-certified dermatologist and assistant professor of dermatology at Columbia University. She also completed her dermatology residency at NewYork-Presbyterian/Columbia ...

and even helps heal sun damage and repair the skin," says board-certified dermatologist Dr. Leah Ansell. While it's been a popular ingredient to add to your nightly facial routine, you might have ...

Medically reviewed by Leah Ansell, MDMedically reviewed by Leah Ansell, MD Estheticians aren't medical doctors, so in most ...