Last month, the Duchess of Sussex shared her affinity for Medicube’s Collagen Plumping Cream—a formula I also love. I have ...

A dermatologist weighs in on one of the serum's main ingredients, peptide Argireline — and explains how it works.

Collagen and its benefits seem to be touted everywhere. It’s peddled in powders, pills and skincare—just for starters. But ...