Which hair types cannot be treated for hair reduction?

Blonde or white hair cannot be effectively treated for hair reduction using laser therapies. This is primarily due to the lack of melanin in lighter hair colors, which is essential for the absorption of laser light. Laser hair reduction systems work by targeting the pigment in the hair (melanin) to generate heat that damages the hair follicle, thus inhibiting future hair growth.

Since blonde and white hair contain significantly less melanin than darker hair types, the laser is less effective at absorbing into the hair, resulting in inadequate follicle damage and reduced efficacy of the treatment. In contrast, black and coarse hair, thick and dark hair, and even curly hair generally exhibit higher levels of melanin, making them more suitable candidates for laser hair reduction treatments.