In general, children's hair is lighter and more fragile than that of adults. Hair color is determined by the quantity and quality of melanin present, a pigment produced by specialized cells called melanocytes. These are located, in addition to the epidermis, in the bulb of each hair. The enormous range of hair colors derives from two types of melanin: eumelanin, which dyes the mane dark -brown and black-; and pheomelanin, which gives red, blonde or silver hair.
With age, the mane darkens , causing many children's hair to change from light to brown. This is due to the progressive maturation of the melanocytic system and the increase in the average density of melanocytes.
