Which hair growth phase is identified as the stage during which hair is actively growing?

The anagen phase is identified as the stage during which hair is actively growing. During this phase, hair follicles are firmly anchored to the scalp, and the cells in the hair bulb are rapidly dividing. This growth phase can last for several years, resulting in significant hair length increases. The length of the anagen phase varies among individuals and can be influenced by genetics, age, and health.

The telogen phase, in contrast, is the resting stage of hair growth where the hair is not actively growing but remains in the follicle before it sheds. The catagen phase marks the transitional stage following anagen, during which hair stops growing and begins to detach from the hair follicle. The exogen phase is when the old hair actually falls out, often occurring at the end of the telogen phase. Thus, the distinction of actively growing hair aligns firmly with the characteristics of the anagen phase.