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Bright lights at night linked to higher breast cancer risk
Two independent studies in the Journal of the National Cancer Institute find that women who work night shifts may have a 40 to 60 percent higher risk of breast cancer, with risk rising with longer duration. The studies tie melatonin suppression from bright nighttime light to increased estrogen production, though researchers call for more work to confirm causation and define relative risk.
MENTIONED IN THIS ARTICLE
Washington
Journal of the
National Cancer Institute
Scott Davis
Fred Hutchinson Cancer Research Center
Seattle
Francine Laden
Brigham and Women’s Hospital
Boston
Larry Norton
Memorial Sloan-Kettering Cancer Center
New York
Norton
Davis
Brigham and Women
Laden
American Cancer Society
United States
S. Eva Singletary
M.D. Anderson Cancer Center
Houston