TLDR Lasers and intense pulsed light can safely and effectively remove hair by targeting hair follicles.
Laser and intense pulsed light (IPL) technologies for hair removal worked on the principle of selective photothermolysis, targeting melanin in hair follicles. Devices like long-pulse ruby, alexandrite, and diode lasers were effective, especially for individuals with dark hair and fair skin. The FDA defined successful hair removal as a 30% reduction in hair growth 3 months post-treatment, indicating temporary rather than permanent results. Side effects included discomfort, erythema, and edema, typically lasting 1-3 days. Proper eye protection was crucial due to the risk of retinal injury. While temporary hair reduction was reliably achieved, permanent hair loss was less consistent.
294 citations,
August 1999 in “Journal of the American Academy of Dermatology” Laser hair removal is safe with the right settings, but side effects like pain and skin changes are more common in darker or tanned skin.
85 citations,
June 1999 in “Dermatologic Surgery” The long-pulsed alexandrite laser is safe and effective for hair reduction.
150 citations,
April 1999 in “Dermatologic Clinics” Laser hair removal effectiveness depends on targeting hair structures without harming the skin, and improvements require more research and expert collaboration.
92 citations,
January 1999 in “Physics in Medicine and Biology” Skin can be cooled quickly and safely during laser treatments to protect it without affecting deeper layers.
20 citations,
July 1998 in “Archives of dermatology” 52 citations,
June 1998 in “British journal of dermatology/British journal of dermatology, Supplement” Ruby laser treatment is effective and well-tolerated for reducing hair growth.
46 citations,
December 2000 in “Seminars in Cutaneous Medicine and Surgery” Laser and light treatments offer quick, long-lasting hair removal for large areas.
