Do you know hair has period of life?

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Do you know hair has period of life?
Hairs have period. The steps are above.  otherwise, there are many reasons that will influence the period. 

l   90% of hairs are in anagen, 1-2% are in catagen, and 10-14% are in telogen.
l   The period depends on the hair follicle of body parts. For example, eyebrows are 4 months, and
the hairs on head are there to four years. The period also determines the length of hair.
l   The period is also influenced by the environment of hairs such as epidermal growth factor, etc.

The hairs fall off also by the gene. The hairs will be from terminal hairs to vellus hairs

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