A writer with type 1 diabetes was surprised by the link between hair loss and hyperglycemia. Doctors helped her reverse the shedding. Here's how.

Red light therapy is everywhere, but can it actually help with hair growth? Two dermatologists weigh in to share how red light therapy works, what to expect, and more.

Dealing with hair thinning or shedding? Try one of these top-rated red light hair growth devices, recommended by a dermatologist and beauty editors.