This is an excellent treatment for dry scalp as well as helping promote hair growth using the photon light therapy most clients have noticed hair regrowth within a few sessions 39hair restorationrejuvenation photon light therapy red photon at 635nm penetrates into the cell at the exact depth causing cell division and rejuvenation this is caused by an increase in adenosine triosphate or atp within the cell atp is the energy generated and released by mitochondria that keeps cells and