白发向来是衰老的标志,几乎不受欢迎,但科学家通过对头发变白过程的研究发现,头发变白有助于人体抗击癌症。人体内的黑素细胞产生使头发着色的色素,其数量由干细胞决定。据英国《新科学家》杂志网站报道,日本东京医科牙科大学的西村惠美及其同事通过实验发现,当毛囊中的干细胞减少的时候,头发就会变白。当研究人员将实验鼠接触能损伤DNA的辐射 White hair has always been a sign of aging, almost unpopular, but scientists through the white hair process research found that the white hair helps the body fight cancer. Melanocytes in the human body produce pigments that color the hair, the number of which is determined by stem cells. According to a report by the British “New Scientist” magazine, Megumi Nishimura of Tokyo Medical and Dental University and his colleagues found through experimentation that when the hair follicles are depleted of stem cells, the hair turns white. When researchers exposed mice to radiation that could damage DNA