Hair stem cells make hair, and pigment-forming stem cells make pigment. Typically they work together, but either can wear out, sometimes prematurely.
“Hair actually goes white but looks grey because of the contrast against he hairs natural colour,” say Alan Buki is the Co-Founder of Original & Mineral, and Wayne Lewis, Technical Director of Original & Mineral. “Over time we lose the Melanin from all of the hair cuticles.”
“There is no rhyme or reason for why we go grey; genetics, stress, diet and getting older are just part of life. Some people will go grey from 18 while some people won't go grey until late 60's.
Researchers are still trying to figure out if a medicine, or something you could put in your scalp, could slow the graying process. (Hair dye simply coats your hair in color but doesn't alter its structure.)
Nov 25, 2013