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Life cycle of Hair

Each hair goes through three phases during each life cycle, which under normal circumstances is three years and four months.
There are approximately 25 such life cycles in a human beings life.
During this life cycle hair goes through the following stages:

  1. The phase of growth=>Anagen phase => 3 years
  2. The phase of fall =>Catagen phase => 3 weeks
  3. The phase of rest => the Telogen phase => 3 months

Unlike most Mammals hair does not grow and fall together; otherwise every 3 years and 4 months we would go bald!


Hair Growth and Expansion


100,000 – 150,000


100-300 per sq. cm.


50-100 micrometers

Growth Rate

0.3-0.5 mm./ day or 1-2cm./ month


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