On the other hand, there were also cases where 'black hair turned gray ... reverse the graying of hair. Gray hair caused by stress may return to its original color when stress is relieved ...
Getting stuck means no pigment cells, which means gray hair. “It is the loss of chameleon-like function in melanocyte stems cells that may be responsible for graying and loss of hair color ...
When we start to go gray depends a lot on genetics. Your first gray hairs usually appear anywhere between your twenties and fifties. For men, gray hairs normally start at the temples and sideburns.