A woman's blood provides better sustenance for breast cancer just after she's been exposed to bright light than when she's been in steady darkness, researchers led by David E. Blask of the Bassett Research Institute in Cooperstown, N.Y., report.
"Light at night is now clearly a risk factor for breast cancer," Blask says. "Breast tumors are awake during the day, and melatonin puts them to sleep at night." Add artificial light to the night environment, and "cancer cells become insomniacs," he says.
"Light at night is now clearly a risk factor for breast cancer," Blask says. "Breast tumors are awake during the day, and melatonin puts them to sleep at night." Add artificial light to the night environment, and "cancer cells become insomniacs," he says.
http://www.sciencenews.org/articles/20060107/bob9.asp
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