Understanding hair growth (and loss).

Chances are, if you’re reading this, you’re primarily concerned with hair loss restoration. But, a good working knowledge of how hair grows can help you understand how and why hair loss occurs.

The average adult head has about 100,000 to 150,000 hairs. It’s typical for most people to lose about 100 hairs a day. You often hear people say hair grows more in summer but it isn’t true. Any hair restoration surgeon will tell you that hair has three specific growth cycles. There is the Anagen cycle when a hair is actively growing. This period lasts from two to six years. There is also the Catagen cycle. During this phase, which only lasts from two to three weeks, the hair is in transition. This is followed by the Telogen cycle where the hair stops growing for two to three months. After this cycle, the hair falls out and the growth period or Anagen cycle starts all over again.

A hair restoration surgeon will also tell you that about 90% of the hair on a person’s scalp is growing. A hair restoration surgeon will also tell you that hair growth slows as part of aging.

There you have it. Now that you have a better understanding of why hair grows, you’ll be able to better understand your research about why hair doesn’t grow.