Hair develops wherever on the human skin with the exception of on the palms of our hands and the bottoms of our feet, however numerous hairs are so fine they’re basically undetectable. Hair is comprised of a protein considered keratin that is delivered in hair follicles in the external layer of skin. As follicles create new hair cells, old cells are being pushed out through the surface of the skin at the rate of around six inches per year. The hair you can see is really a string of dead keratin cells. The normal grown-up head has around 100,000 to 150,000 hairs and loses up to 100 of them daily; finding a couple of stray hairs on your hairbrush isn’t really reason to get excited.