Hair is built by the hair follicle from dead proteins produced by skin cells called keratin.
It takes several weeks of growth before a hair shaft will emerge above the surface of the skin where it can be seen. This active stage of growth is referred to as anagen. Cutting the hair shaft above the skin surface does not affect its cycle of growth . The dried-up hair root is referred to as being keratinized. The keratinized bulb acts as an anchor within the hair follicle for the shedding hair. .