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Scientists have found that stress turns
hair grey, white or silver in mice. Stem cell
from Harvard University did a
of tests on mice to find the
of stress on them. The scientists injected the mice with the
in chili peppers that gives them their
. This made the mice stressed. It caused a hair-colouring
in the mice to overwork as a
to the stress. It used up all colour-regenerating stem
and the mice's hair rapidly turned white. A researcher said: "The detrimental impact of stress that we discovered was beyond
I imagined."
