That's a pretty alarming finding to be honest. It's not just hair graying, it's also all kinds of other tissue damage that can occur, as the last few paragraphs

That's a pretty alarming finding to be honest. It's not just hair graying, it's also all kinds of other tissue damage that can occur, as the last few paragraphs hint at. Stress may just kill us more directly than we've suspected, instead of through its physiological effects like e.g. elevated blood pressure and the effects from that.