"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Along with retinol and hyaluronic acid, one of the skincare ingredients you likely hear about most is ...

This is the best vitamin C serum for face application if you’re not prone to breakouts, Dr. Day says. “The addition of ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? To get the scoop on niacinamide and vitamin C, including what each of them ...

Kristie Reed, PharmD, oversees emergency, general medical, surgical, psychiatric care, and oncology medication as the pharmacy director of a community hospital. Dr. Reed specializes in IV medications.