By 22, he was pretty ... in our hair bulb produce a little bit of hydrogen peroxide, which is a metabolic byproduct, and typically there's an enzyme called catalase that breaks this down to ...

While grey hair is a natural part of ageing, experts suggest there are ways to slow the process ... these lifestyle adjustments may help slow it down and promote healthier hair for longer.

That's what the study found when it matched the protein history of the hairs (which grow at a pretty reliable ... however, there's a lot still to nail down about the science of hair graying.