The active growth stage is the optimal window during which a pilosebaceous unit is undergoing cell division. At this stage the hair is firmly anchored within the dermis, and receives nourishment from the dermal papilla that delivers essential nutrients.

Crucially when melanin levels peak the greatest amount of melanin, the natural pigment that determines hair color. Photothermolysis treatment is fundamentally based on targeting this melanin.

The laser device produces a specific light spectrum radiation that is selectively absorbed the melanin in the hair shaft. Once absorbed, the photonic energy transform into focused warmth, which triggers selective photothermolysis the bulb and papilla, capable of suppress or prevent new hair production.

Because only hairs in the anagen phase contain adequate pigment and are connected to the blood supply, only these hairs that can effectively absorb the laser energy. Therefore, in each treatment, the device can only deactivate a portion the hair in the treated area.

Shedding or dormant hairs lack attachment to the blood supply and do not contain adequate pigment, causing them to be unresponsive to the wavelength.

This fundamental limitation accounts for why repeated treatments are required to capture every active growth as they cycle the growth stage.

Precision timing and consistency are non-negotiable for securing long-term, lasting results.

Grasping hair growth cycles equips both practitioners individuals to manage outcomes effectively and эпиляция воском глубокое бикини цена optimize treatment schedules that match natural hair growth cycles.