Grey in the core of each hair. Melanin is also responsible for the color of the skin and of the eyes. There are only two types of pigment: dark (eumelanin) or light (phaeomelanin). Combined in various combinations, these pigments create all natural hair colors. Melanin itself is the product of a specialized cell, the melanocyte, which is found in each hair follicle, from which the hair grows. As hair grows, the melanocyte injects melanin into the hair cells, which contain the protein keratin and which makes up our hair, skin, and nails. As long as the melanocytes continue injecting melanin into
Debra Nails Debra Nails Debra Nails (born November 15, 1950) is an American philosophy professor and well known classics scholar who taught at Michigan State University. Nails earned her M.A. in philosophy and classical Greek from Louisiana State University before going on to earn a Ph.D. in philosophy at the University of the Witwatersrand, Johannesburg in 1993. Previously, she taught in the Department of Classics, Philosophy, and Religion at Mary Washington College. Nails taught courses on the history of philosophy, continental rationalism, metaphysics, and modern philosophy. Nails' work primarily focuses on ancient Greek philosophy, metaphysics, feminist philosophy, and early modern philosophy. She