To have the most effective treatment, if you have been tanning, waxing, plucking or using depilatories on the area, please discontinue at least 4 weeks prior to treatment. For your appointment, arrive with the area shaven with a minimal amount of growth and ready for treatment. The laser energy is absorbed by the pigment (not effective on blonde, red & white/gray color) in the hair follicle. In a fraction of a second, all hairs in their active growth phase are disabled.