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

These are the best products for combating hair thinning, crepey skin and more. Shop Rogaine, Dove, Neurogena and other beauty problem-solving products.

If there’s one thing celebrities know, it’s how to glow under the flashing lights. But what’s the secret behind their ...