A light-based treatment using low-energy red or near-infrared light to stimulate hair follicles.
Low-level laser therapy, sometimes called photobiomodulation, uses specific wavelengths of light delivered by caps, combs or clinic devices. Studies suggest it may modestly improve hair density in some people with androgenetic alopecia, but protocols and device quality vary. It is usually considered an adjunct, not a replacement for core treatments such as minoxidil or antiandrogens where appropriate. Advantages include being non-invasive and generally well tolerated. Limitations include cost, time commitment and uncertainty about the best wavelength, dose and maintenance schedule.
Kaiser M et al. Treatment of Androgenetic Alopecia: Current Guidance and Unmet Needs, 2023 — https://doi.org/10.2147/CCID.S385861; British Association of Dermatologists: Hair loss male pattern (androgenetic alopecia) — https://www.bad.org.uk/pils/hair-loss-male-pattern-androgenetic-alopecia; British Association of Dermatologists: Hair loss female pattern (androgenetic alopecia) — https://www.bad.org.uk/pils/hair-loss-female-pattern-androgenetic-alopecia
