The intense pulsed light is absorbed by the melanin in hair (which gives hair its colour), changing it from light energy to heat energy. This heat is transferred to the growth cells in the bulb/base of the hair, permanently disabling them. Providing they are in an active stage of hair growth (Anagen stage). If hair is in phase Catagen or Telogen phase IPL hair removal is not effective.

Between Treatments:

Face and neck:every 4 weeks
Bikini and underarm: every 6 weeks
Legs: every 8 weeks