Gray hair is a natural sign of aging, but sometimes it can take on a yellowish hue that's not so flattering. Today, we're ...

According to Joe, he started going gray when he was 16 ... The cells in our hair bulb produce a little bit of hydrogen peroxide, which is a metabolic byproduct, and typically there's an enzyme ...

When we start to go grey ... the hair strand without changing its structure. But permanent products cause a chemical reaction ...