For a study, it was determined that unwanted face and body hair was a typical occurrence in many individuals, particularly in females with hirsutism. With breakthroughs in laser and light technologies, people with fair skin can obtain clinically significant hair removal. The increased melanin concentration of the skin in individuals with darker skin, Fitzpatrick skin types (FST) IV-VI, conflicted with the suggested process of laser-induced selective photothermolysis, which was to target the melanin in the hair follicle to cause irreversible loss of hair bulge stem cells. Many prospective and retrospective studies on laser and light hair removal devices had been undertaken, but most omit individuals with darkly pigmented skin since they are considered a high-risk category for undesired side effects such as pigmentation changes, blisters, and crust development.
Researchers searched the available literature for research on hair decrease in those with a darker complexion. Longer wavelengths were identified as a key component of the treatment protocol in the existing literature for the patient population, and neodymium-doped yttrium aluminum garnet (Nd: YAG), diode, alexandrite, and ruby lasers, as well as certain intense pulsed light sources, were indicated for safe hair reduction with minimal side effects in patients with FST IV-VI, as long as energy settings and wavelengths were appropriate. According to the findings of the research, safe and effective hair removal for FST IV-VI patients as possible with suitable treatment protocols and energy settings.
Reference:link.springer.com/article/10.1007/s40257-017-0316-7
