1. Your hair, skin and eye color are determined by genes. Hair color is determined by the interaction of two forms of pigment, eumelanin and pheomelanin pigments, produced by melanocyte cells. As the melanocytes decay with age, your hair starts turning grey and later on takes on a white shade. 2. Dark hair contains higher levels of carbon than light or blonde hair. 3.Hair is the second fastest growing tissue in the human body, after bone marrow. Studies show that male hair grows faster than female hair. 4. Contrary to popular belief, cutting your hair does not affect the rate of hair growth, nor its texture. 5. A hair strand’s.