Understanding HAIR LIFE CYCLE
Hair Growth Cycle
Hair on the scalp grows about 0.3 to 0.4 mm/day or about 6 inches per year. At any given time, a random number of hair will be in one of three stages of growth and shedding; anagen, catagen and telogen.
Anagen: Anagen is the active phase of the hair. The cells in the root of the hair and dividing rapidly. A new hair is formed and pushes the club hair (a hair that has stopped growing or is no longer in the anagen phase) up the follicle and eventually out.
Catagen: The catagen phase is a transitional stage and about3% of all hairs are in this phase at any time. This phase lasts for about two to three weeks. Growth stops and the outer root sheath shrinks and attaches to the root of the hair. This is the formation of what is known as a club hair.
Telogen: Telogen is the resting phase and usually accounts for 6% to 8% of all hairs. This phase lasts for about 100 days for hairs on the eyebrow, eyelash, arm, and leg. During this phase, the hair follicle is completely at rest and the club hair is completely formed