Benefits: Known as the “hair vitamin,” biotin improves keratin production, which is essential for strong, shiny hair. It’s ...

The CurrentBody LED Hair Growth Helmet, $860, promises thicker hair in 12 weeks. (Try to ignore the Stormtrooper vibes.) You could almost pass off the HigherDOSE Red Light Hat, $449, for a regular cap ...

Despite the rumors, stress isn’t what causes the majority of hair loss guys deal with. It’s genetics—something called ...