Hair Loss Facts

Just the facts.
3

Hair contains information about substances in your bloodstream over the course of several years, including drugs and alcohol.

5

At any given time, 90 percent of the hairs in your scalp are growing, while the other 10 percent are resting.

7

The fundamental building block of human hair is keratin, the same protein found in claws, hooves, beaks and horns.

8

The lifespan of a strand of hair is approximately five years.

11

Some men begin losing hair in their teens.

16

Bone marrow is the fastest growing tissue in the body, while hair is the second fastest.

17

A strand of human hair is stronger than copper wire of the same diameter.

19

Hair naturally grows in small bundles of one to five hairs. These bundles, along with their support system of glands, muscle and connective tissue form a “follicular unit.”