“I see red light therapy as a way to energize weakened hair follicles and keep them in the growth phase longer.” Dr. Kseniya ...

Right insert: fluorescent microscopy image of hair follicles under the skin; cell nuclei (blue), epithelial cells (green), human dermal papilla cells (red). Disclaimer: AAAS and EurekAlert!

The DHT in turn causes follicles to sprout shorter and finer hairs before eventually dying out. It also causes the growth phases of hair follicles to become shorter, and the rest phases to be longer.

One red flag? Devices that generate excessive heat. “Heat can damage hair follicles and worsen inflammation,” warns Dr. Koberts. If the device feels too warm, it’s likely not high-quality.

Researchers have grown hair follicles from mouse pluripotent stem cell lines for the first time. Until now, hair follicles could only be grown in vitro using primary cells isolated from embryonic skin ...

In Part I of the review (July/August 2004), the anatomy of hair follicles, the diagnostic approach to diseases leading to hair loss, and nonscarring alopecias were discussed. In this article (Part ...