Women's Health Weekly
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Breast Cancer
Artificial light at night stimulates growth of breast tumors in laboratory mice
January 19th, 2006
Results from a new study in laboratory mice show that nighttime exposure to artificial light stimulated the growth of human breast tumors by suppressing the levels of a key hormone called melatonin. The study also showed that extended periods of nighttime darkness greatly slowed the growth of these tumors. The study results might explain why female night shift workers have a higher rate of breast cancer. It also offers a promising new explanation for the epidemic rise in breast cancer incidence in industrialized countries like the United States. The National Cancer Institute and the National Institute of Environmental Health...
Source: Women's Health Weekly (2006-01-19)
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