Gap Fill - Greying Hair - Level 6


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Paragraph 1

Scientists have discovered that stress is one in turning our hair grey, white or - at , in mice. Stem cell biologists from Harvard University in the USA conducted a of tests on mice to ascertain the of stress on the . The scientists injected the mice with an found in chili peppers that gives them their heat. The compound made the mice stressed. This caused a hair-colouring pigment in the mice to go into overdrive as a to the stress and deplete colour-regenerating stem cells. This caused the mice's hair to turn white. Lead researcher, Professor Ya-Chieh Hsu, said: "The impact of stress that we discovered was beyond what I imagined."

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