Laser hair removal uses a concentrated beam of light (laser) to target and destroy hair follicles. The pigment (melanin) in the hair absorbs the light, which heats and damages the follicle to inhibit future growth.
Laser emits light at a specific wavelength.
Melanin in the hair shaft absorbs the light—this is why darker hair absorbs more effectively.
The heat destroys the follicle, slowing or stopping regrowth.