The average human scalp is covered with 100,000 hair follicles. Although that sounds like a hefty supply, no new follicles are formed after birth, so you will certainly want to hang on to every follicle for as long as you can. Around the age of 30, both men and women will start losing hair, although men tend to lose it at a much faster rate. Hair naturally thins with age, but there are many other factors that can contribute to excessive shedding, including genetics, medications, hormones, illness and stress. Over time, the hair follicles shrink and eventually they stop growing altogether. This is due to a shortening of the anagen cycle, which gradually stops altogether.
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