Have you noticed that some people in their thirties have quite a bit of grey hair while others in their forties or fifties hardly have any? Why does hair turn grey? Everyone has probably wondered the same thing. Gray hair isn’t really so mysterious. There is a scientific explanation for why your hair turns gray and what causes it to grey prematurely.
Each strand of hair comprises of two components: the shaft (upper part) and the root (lower part anchored under the skin). The hair root is surrounded by hair follicles. The hair follicle is what is responsible for the growth and characteristics of each hair strand. One of these characteristics is hair coloration.
Hair follicles have cells that produce melanin. This is the same substance that gives color to your skin. Melanin has two forms and each form has its own corresponding color. Eumelanin makes hair dark and plaeomelanin makes hair light. When these two substances mix together, an entire spectrum of hair shades can result.