Laser is approved by the FDA for hair reduction whereas electrolysis is approved by the FDA for permanent hair removal. The biggest difference between electrolysis and laser hair removal is that the laser targets the hair and not the follicle.
Here’s how it works: Laser targets the pigmentation of the hair and sometimes, the skin. The heat from the laser damages the hair and slows the process of hair growth. The current from electrolysis destroys the hair and hair germ cells in the hair follicle which are responsible for the regeneration of new hair.
Laser can still be effective and sometimes damage the hair enough to prevent regrowth but results can vary person to person. Laser works best for those who have light skin and dark hair but electrolysis can work on anyone regardless of skin or hair color.