Laser Hair Removal does work on beards, but only on certain beards. The technology works by focusing a powerfully intense beam of light on the melanin in your hair, destroying the follicles. Because melanin is a dark pigment, laser removal will not work on people with blond, white, light red or light brown hair.

On the Other: Success Not Guaranteed

Even if your hair is of a darker shade, the success of laser beard removal is not guaranteed. For men with darker skin, the laser must be set to a lower power grade, resulting in more treatment sessions and frequently patchier results. Men with light skin and dark hair are the ideal candidates for successful laser beard removal.

Bottom Line

Even ideal male candidates will usually have to endure several treatments of laser beard removal, as the technology targets "active" hair follicles, and only a percentage of the body's hair is actively growing at any time. Additionally, the process can be quite costly, about $350 per session on average. However, if you possess the necessary physical traits and are ready to commit time and money to the process, laser beard removal is a viable alternative to regular shaving.

Source:

The Mayo Clinic

The Hair Removal Journal