Many hundred years have however to pass by until this awful prophecy will become true. Until then we have enough time to study and understand the life of hair. Hair is actually dead material when it leaves it's root - otherwise it would hurt very much when your hairdresser works with his scissor. A blonde head of hair has usually much more fibers than red or dark haired heads. Hair consists mainly of keratin, which is also responsible for the elasticity of fingernails.
Hair is strong as a wire of iron.
The root of a hair fiber sticks in a bag in the skin. The fiber is pushed out of this bag about 0.35mm per day, making an average growth rate of 1cm, or half of an inch, per month. Healthy hair has an average lifetime of 2-6 years. After a rest period of three months the single hair falls out, and a new fiber starts to grow out of the bag. The lifetime depends on circumstances and person, too.