Treatment of Alopecia with Low-Level Light Therapy

November 2025 in “ SKIN The Journal of Cutaneous Medicine ”

Aysham Chaudry, Alec Lawson, Wilhelmina Lam, Alexandra DeVries, Robert Vanaria, Mark Nestor

low-level light therapy alopecia androgenetic alopecia telogen effluvium alopecia areata cicatricial alopecia traction alopecia nitric acid DHT follicular cells mitochondrial activity inflammatory pathways minoxidil finasteride LLLT androgenic alopecia Rogaine Propecia

TLDR Low-level light therapy safely increases hair growth in various types of hair loss.

Low-level light therapy (LLLT) is a safe and non-invasive treatment for various types of alopecia, including androgenetic alopecia (AGA), telogen effluvium (TE), alopecia areata (AA), and some cicatricial and traction alopecias. It works by releasing nitric acid, increasing blood flow, inhibiting DHT, stimulating follicular cells, enhancing mitochondrial activity, and modulating inflammatory pathways. LLLT has been shown to increase hair density and count, especially when used in combination with minoxidil or finasteride. The therapy is well tolerated, and advancements in at-home and dual-wavelength devices have made it more accessible and improved patient adherence.