What is the life cycle of hair?

  The production of hair is not continuous but cyclic. The growth phase (Anagen) is succeeded through a transitional phase of regression (Catagen), by the rest phase (Telogen), and the cycle is preserved. During the relatively long Anagen phase (lasts for 1,000 days, i.e. 2- 5 years), the matrix cells divide, become keratinized and hair…