Hair

Hair Growth Cycle

In general, hair will grow approximately six inches each year. During this period, there are three phases of growth that will occur:

Anagen Phase

The anagen phase is the active hair growth phase. During this phase, the cells of the hair root rapidly grow and divide. Once a new hair forms, it will push upward out of the follicle. If there is already a hair in the follicle (known has a ‘club’ hair), that hair will be pushed out, or shed. This shedding is part of the normal cycle. The new hair replaces and becomes the ‘club hair’.

During the anagen phase, the hair will grow approximately one centimeter each month. This active growth phase will last from two to six years. You may have friends, or perhaps experience yourself, the inability to grow your hair beyond a certain length. This usually means that you have a ‘short anagen’ phase. Naturally, people who are able to grow their hair very long very quickly, have a ‘long anagen’ phase.

Obviously, the length of the anagen phase is different in other parts of the body. Eyebrows, eyelashes, body hair – under normal circumstances, these areas will have a very short anagen phase.

Catagen Phase

During the Catagen phase, growth of the hair stops. The outside root sheath of the follicle will shrink and attach itself to the root of the hair.

Telogen Phase

The telogen phase is what we consider to be the ‘resting’ phase of the growth cycle. During the telogen phase, which lasts for approximately 100 days, the follicle is at rest, and the club hair is completely formed, with a whitish bulb at the root (noticeable if you were to pull a telogen hair out and look at the root). It is normal to shed between 25 and 100 telogen hairs each and every day.