Hair follicles grow in repeated cycles. One cycle consists 3 stages:
→ Anagen: It is the growing phase of a hair follicle (85-90%) which lasts about 3 to 6 year. Hair grows approximately 10cm per year.
→ Catagen: At the end of the growth phase, hair follicles (1%) prepare themselves for the resting phase. This stage of the hair growth cycle usually lasts about 1 to 2 weeks.
→ Telogen: The resting phase follows the catagen phase and normally lasts about 1 to 3 months. During this time the hair (10-15%) does not grow. At the end of the Telogen phase the hair follicle re-enters the Anagen phase.