Treatment of Alopecia with Low-Level Light Therapy

Main Article Content

Aysham Chaudry, DO https://orcid.org/0009-0005-5303-5850
Alec Lawson https://orcid.org/0009-0001-5147-9803
Wilhelmina Lam, DO, MPH https://orcid.org/0000-0001-6709-4281
Alexandra DeVries https://orcid.org/0009-0008-6576-2432
Robert Vanaria
Mark S. Nestor, MD, PhD

Keywords

LLLT, Alopecia, hair loss, Red light

Abstract

Low-level light therapy (LLLT) is a safe, non-invasive treatment for various alopecias, offering an alternative or adjunct to pharmacologic therapies. By using specific wavelengths, LLLT releases nitric acid, increases blood flow, inhibits DHT, stimulates follicular cells, enhances mitochondrial activity, and modulates inflammatory pathways. In androgenetic alopecia (AGA), LLLT increases hair density and count, with combination therapy alongside minoxidil or finasteride showing enhanced outcomes. Evidence also suggests benefits in telogen effluvium (TE), alopecia areata (AA), and select cicatricial and traction alopecias, primarily through anti-inflammatory and follicular stimulation mechanisms. LLLT is well tolerated, and advances in at-home and dual-wavelength devices have improved accessibility and adherence.

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