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Why Hair Goes Gray
Study Blames a Chain Reaction
That Makes Hair Bleach Itself From the Inside
Out
By Miranda Hitti
WebMD Health News
Scientists may have figured out why hair turns
gray, and their finding may open the door to new
anti-graying strategies.
New research shows that hair turns gray as a
result of a chemical chain reaction that causes
hair to bleach itself from the inside out.
The process starts when there is a dip in levels
of an enzyme called catalase. That catalase
shortfall means that the hydrogen peroxide that
naturally occurs in hair can't be broken down.
So hydrogen peroxide builds up in the hair, and
because other enzymes that would repair hydrogen
peroxide's damage are also in short supply, the
hair goes gray.
Putting the brakes on that chemical chain
reaction "could have great implications in the
hair graying scenario in humans," write the
researchers, who included Karin Schallreuter, a
professor clinical and experimental dermatology
at England's University of Bradford.
The study appears online in The FASEB Journal;
the FASEB is the Federation of American
Societies for Experimental Biology.
© WebMD Inc. All rights reserved.
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Putting the brakes on that
chemical chain reaction "could have great
implications in the hair graying scenario in
humans"
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