[ 2006-12-11 16:39 ]
Although too much exposure to the sun's ultraviolet
rays can cause skin cancer, sunshine may have protective effect against some
cancers, a U.S. scientist said in April. He said vitamin D, the so -called
sunshine vitamin can help to slow down the speed at which cancer cells divide.
It is abundant in cod liver oil, fortified milk and dairying products, and some
fatty fish. The study found inverse associations between both residential and
occupational exposure to sunlight and mortality from female breast and colon
Scientists found the more deaths from skin cancer in sunnier states but the
number of people who died from the other cancers was lower in sunshine area.
Working outdoors in a sunny climate was also associated with fewer breast and
colon cancer deaths but not with the other cancers.
（来源：《英语沙龙》北京林业大学通讯员邢元媛供稿 英语点津Annabel 编辑）