What is the anagen phase known for in the hair growth cycle?

The anagen phase is recognized as the active growing phase of the hair growth cycle. It is during this time that hair follicles produce new hair cells at a high rate, which results in the lengthening of the hair strand. This phase can last several years, depending on genetic factors and individual health, contributing significantly to the overall length of the hair.

The other options describe different phases of the hair growth cycle. The resting phase pertains to the telogen stage, where hair follicles prepare to shed hair. Shedding occurs in the catagen phase, which is a transitional stage. Conditioning treatments may be beneficial at any stage but are not specific to any phase of hair growth.