Cool How Many Sessions For Laser Hair Removal References. But is laser hair removal permanent, and how long would it take for hair to regrow? Laser hair removal is most effective for people who have light skin and dark hair, but.

That said, everyone is different, so you may find that you need fewer sessions (or more). This light source heats and destroys hair follicles in the skin, which disrupts hair growth. Resting follicles do not contain any pigment, making them invisible to the laser.