The Mid-Follicle Region The mid-follicle region is where the actively growing cells die and harden into what we call a hair. As the cells below continue to divide and push upwards, the hair grows upwards, eventually out of the skin. It now consists of a mixture of different forms of the special hair protein, keratin.
Some of these keratins contain a high level of sulphur, some much less. The sulphur plays an important role in the way the hair behaves, especially when it is given cosmetic treatments.
What is the hair shaft?
This is the part of the hair that can be seen above the scalp. It consists primarily of dead cells that have turned into keratins and binding material, together with small amounts of water.