Hair Growth Cycle Hair on the scalp grows at a rate of about 6 inches/ year. At any given time, a random number of hairs will be in various stages of growth and shedding. There are three stages of hair growth: catagen, telogen, and anagen. Anagen phase The anagen phase is known as the growth phase. It begins in the papilla and can last from two to six years. The span at which the hair remains in this stage of growth is determined by genetics.
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