IPL, (Intense Pulsed Light) is a broadband pulsed light source that emits a beam of light that heats up the melanin in your hair follicles causing the root to be damaged. With repeated use, IPL delays the production of new hair preventing regrowth over time. The energy of the light, frequency of usage and colour of your hairs are all determining factors in defining how effective the IPL treatment will be. The best results are achieved on people with dark hair and fair skin, but if you have sensitive or slightly darker skin then you may have to repeat the IPL process more times to achieve the desired result as it must be treated with lower energy to avoid discomfort.