How can grow hair?

Normally, each hair of 140,000 covering the scalp goes through three successive phases of development: anagena, active growth phase that lasts between 2 and 6 years; catagen, resting period that lasts from 2 to 3 months; and telogena , During which the hair dies and falls.

This capillary agony does not exceed three months. Thus, hair reaches its maximum length during the active phase of growth. If at this time is not short or boots, the hair grows between 0.37 and 0.44 millimeters every 24 hours and can reach several meters in length measured before falling.
For example, the china Yuequin Dai, 26, wears a mane of 4.2 meters long. The downside: invests two hours per day for having neat.