grey

Just a few weeks ago I made a post about yet another study linking grey hair to increased stress. The mechanism of action described in that study was increased HPA activity and specifically elevated norepinephrine levels. Other studies have also implicated tryptophan/serotonin, which is still...

Not exactly news for most of my readers, but it is a popular topic for many people and, as usual, the response of most doctors is that the premature greying is genetically influenced and not much can be done about it. While the study below conclusively links greying to stress, I think the...