Low Level Laser Therapy (LLLT) is treatment for hair loss based on the principle of photo-biotherapy.

The treatment involves using laser light to stimulate cell growth. The laser stimulates hair follicles into producing thicker hair shafts and fuller hair.

LLLT appears to be most useful in patients with diffuse hair loss (commonly seen in women). As with drug treatments, this treatment is effective for areas of thinning hair, not areas that are totally bald.