Gap Fill - Greying Hair - Level 5


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Paragraph 1

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."

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