Instead, these are hair dyes uniquely formulated for graying and meant to return you to your previously natural color.

The medical term for hair graying is canities. Hair turns gray (or white) when your hair follicles stop creating melanin. Melanin is the substance that gives your skin and hair color.

As we age, these melanocytes "become less active, leading to hair that lacks pigment and looks gray, silver or white," ...

It’d be nice if our hair stayed its true color as we acquire more years, but the reality is that in the majority of cases ...