Ultimately, the hair follicle falls out as a resting period, the telogen stage. By the 6th year, new hairs grow and the hair growth cycle begins again. The number of hair on a healthy scalp is approximately 100,000. The average rate of hair fiber growth is around half an inch per month. This rate varies depending upon the hair follicle and the age of the individual.
New hair starts to grow from the same follicles.
Hair starts to recede when fewer number of new hair is in the re-growth stage. Recent research found that the protein important in hair, bone and cartilage structure, collagen, may harden around the root of the hair and cause hair loss. Collagen hardening interferes with the normal hair growth by suffocating the roots of the hair. The hair cycle slowly becomes disrupted and more hair is shed . In time hair growth stops completely and baldness results.