Keratin is often marketed as a cosmetic miracle, but its real importance goes far beyond shiny hair or smoother skin. This structural protein is fundamental to how the body protects itself from ...

Tara S. Carpenter does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

Collagen supports hair structure and scalp health, while keratin repairs hair strands and enhances hair smoothness and shine. Biotin enhances keratin production for stronger, thicker hair. For ...