Low Level Laser Therapy is also referred as red light therapy, cold laser therapy, Biostimulation or Photobiomodulation.

It is a painless, safe, effective non-invasive and non-surgical approach for hair fall and hair loss.
It works on the principle of photobiostimulation. It is a combination of red laser and LED light diodes that irradiated photons into the scalp tissues. During the process, the photons act on cytochrome C oxidase and produce ATP which is converted to AMP and hence releasing the energy which in turn increases the vascularization (blood supply) to the scalp, thus increasing the supply of nutrients and oxygen to the hair roots. 

This helps to strengthen the roots, reduce hair fall, improve hair density and length of the hair.
Usually 2 sessions per week are given for 3-6 months for best results.