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 ...

Men confronting a receding hairline traditionally have had few choices. Minoxidil and finasteride, the stalwarts of hair-loss treatment, arrived in the 1980s and 1990s. Since then, little has changed.