Low-Level Laser Light is one of the most effective therapies to treat hair loss. Lasers are widely used in medicine and also throughout a variety of industries, in a multitude of varying capacities. The laser energy used to stimulate hair growth is visible in the red light spectrum. The laser light used in promoting hair growth is defined as Low-Level Laser Therapy (LLLT). LLLT is sometimes included under a broader definition of ‘Phototherapy’ called Low-Level Light Therapy, where the light-emitting device may be a laser and/or light-emitting diode (LED). Light from a laser in a specific wavelength has an effect on your body when it is applied for a sufficient length of time.

It is theorized that when the laser light is absorbed by target tissue molecules, the energy level of the molecules is increased and the molecules respond by ‘working off’ the excess energy with adaptive changes. These changes may be chemical or physical, and they may have biological effects on the target tissue or surrounding tissues.

Because the changes in the molecules are brought about by phototherapy, chemical changes are said to be due to ‘photochemistry’ and physical changes to ‘photophysics.’ As a result, the biological effects on tissue are called photobiomodulation. LLLT initiates the chemical reaction in the cells that make up the follicle’s epithelial matrix causing the proliferative activity.Much evidence points out that follicular apoptosis (programmed cell death) is reversed via the application of laser energy. It is important to note that heat is not associated with the photochemical and photo therapeutic effects of LLLT. LLLT is a low wattage ‘cold light’ laser, and while there are visible red wavelengths, there is no sensation on the skin of persons undergoing treatment. Cold lasers are safe and universally accepted as such by medical authorities, worldwide. Also significant is the fact that there are no side-effects associated with the use of LLLT. In treating androgenetic alopecia with LLLT, physicians have found that LLLT is most effective in persons with minimal to moderate hair loss. Individual responses to LLLT differ, and results do vary from person to person.