Based on the principle of selective photothermolysis, the IPL system emits pulses of filtered light that are attracted to melanin, a pigment found in hair. The light is absorbed by the melanin and transformed into heat, selectively destroying the germinating cells that feed the hair follicles for growth. By eliminating these cells, the hair then dies and begins to fall out, inhibiting future growth.
Similarly, for photorejuvenation, the transmitted light applies heat to the skin, promoting the creation of collagen and elastin fibers to replenish the cells that comprise the skin layers; this process produces a filling effect by thickening and re-aligning the skin from the inside out.