Each hair on the human body is in one of three growth stages at any given time: active (anagen) phase, regressive (categen) phase, or resting (telogen) phase. The laser is most effective at disabling actively growing follicles during the anagen stage. At this stage the hair shaft contains the greatest abundance of melanin, the main target of the laser to disable the follicle.
Not all follicles are in the active stage at the same time but could be in their resting or regressive stage; this is why each and every client needs to repeat treatments in order to disable the active hair follicle for permanent reduction. The length of the growth cycles also vary by each body part, this is the importance of having a customized laser hair removal treatment to obtain optimal results.
