"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Collagen is a buzzy skincare ingredient, but what is it exactly? And, do all those trendy collagen face ...

We may earn commission from links on this page, but we only recommend products we love. Promise. Collagen is a buzzy skincare ingredient, but what is it exactly? And, do all those trendy collagen face ...

Looking for the best collagen powder? Our dietitian-approved skin, joint, and wellness picks include Thorne, Needed, and other top brands.