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Low-Level Laser Therapy for Hair Growth

Low-Level Laser Therapy (LLLT) is based on the scientific principle of photo-biotherapy. Photo-biotherapy occurs when laser light is absorbed by cells and stimulates cell metabolism and protein synthesis. Although the exact mechanism by which laser light promotes hair growth is still unknown, it appears to stimulate the follicles on the scalp by increasing energy production and by reversing miniaturization (the process leading to thicker hair shafts and a fuller look).

Laser light in the visible red light spectrum is generated in a laser diode. The energy level is far below that of laser beams that cut or burn tissue. The low-level red laser light has a very low absorption rate in human tissue making it safe for use in the treatment of hair loss.

Low energy lasers have been used for over thirty years to accelerate healing after wounds or burns and to reduce pain. In 1992, Pontinen published the first paper discussing its possible use in promoting hair growth.  Since then there has been much progress is defining the exact parameters necessary to accomplish this,  In 2007, the FDA cleared for marketing the use of low-level lasers for the treatment of androgenetic hair loss in men. This clearance was based on the device’s safety, and not on its effectiveness in treating hair loss.

The HairMax LaserComb, cleared by the FDA as a Class II medical device in January 2007, is a compact version of the larger laser therapy units used by hair clinics in other countries to stimulate hair to increase in thickness and make the hair appear fuller. This home product has teeth that part the hair to potentially enable the laser light to reach the scalp in areas of existing hair.

The Revage Laser System, utilizing Rotational PhotoTherapy (RPT), is available in our Manhattan facility. It is a low-level laser system that contains 30 laser diodes that rotate 180 degrees around the scalp. This dynamic process increases the contact of the laser energy with the hair follicles and is potentially more effective than a static system in delivering the laser energy to the scalp. It also eliminates human error and variability in self administration. The unit may prove to be particularly useful for hair loss in women where the thinning tends to be diffuse.

For additional information on specific low-level laser systems for hair loss go to HairMax LaserComb, X5 Hair Laser and Revage Laser System.