This posted today from Discovery News:
Attention parents: It's not your kids that are making you go gray. Your hair is simply building up too much hydrogen peroxide.
Bottle-blondes may be a fan, but hydrogen peroxide, which is produced naturally in the human body, interferes with melanin, the pigment that colors our hair and skin.
The body also produces the enzyme catalase, which breaks down hydrogen peroxide into water and oxygen. Or at least it does for a while. As we age, catalase production tails off, leaving nothing to transform the hydrogen peroxide into chemicals the body can release.
So, as hydrogen peroxide builds up, we go gray, concluded researchers at the University of Bradford in the United Kingdom, who last week published the results of a study in the Federation of American Societies for Experimental Biology'sonline journal.
[link] to the entire posting
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