How does Hair Laser (Low-Level Laser Therapy – LLLT) stimulate the production of “Adenosine Triphosphate (ATP)” in the hair follicle?

Hair lasers emit cool (non-heat-generating) red light beams at a wavelength of 650 nm to the scalp. This light energy is absorbed by the mitochondria, organelles located within the hair follicle cells. When light is absorbed, the synthesis of Adenosine Triphosphate (ATP), the cell’s main energy unit, is strongly stimulated. Increased ATP production accelerates intracellular metabolism, widens microcirculation (vasodilation) in the scalp, and maximizes the amount of oxygen delivered to the hair follicle. This cellular stimulation awakens dormant hair follicles in the resting phase (telogen), causing them to rapidly transition to the growth (anagen) phase.