Hair Growth Phases: Why Are They Important for Laser Hair Removal?

Each hair goes through three growth phases, which is why laser hair removal is performed as a course of treatments.The effectiveness of the procedure directly depends on the physiology of hair growth and on the phase in which the hair follicle is at the time of treatment.

• Anagen — active growth phase This is the only phase in which laser hair removal is effective.

• Catagen — transitional phase In this phase, the laser can no longer effectively affect the hair.

• Telogen — resting phase The laser does not work in this phase.

Since only a portion of hairs are in the anagen phase at any given time, a course of treatments is required to achieve stable and predictable results, allowing all hairs to be targeted during their active growth phase.