How does Human Hair function?

Each individual hair is formed inside a hair bulb deep in one of the 100,000 hair follicles. The follicle is a tiny but powerful factory, which throughout many people's lifetime hardly ever stops working. It takes in its stride all the shampoo, conditioner, cutting, drying, exposure to sun and wind, colorings and perms. Eventually the hair falls out and, after a short rest period, the follicle starts to produce yet another new hair for up to as many as 20 times