Lights in the Bedroom May Increase Breast Cancer Risk

Cancer causer.



Seeing is believing, and cancer causing, too, apparently.

A new study suggests that light at night, specifically in the bedroom, increases the risk for breast cancer. The finding comes from an Israeli case–control study of 1679 women, published in the February issue of Chronobiology International.

This is the third study to suggest that women who have lights on in the bedroom are at greater risk for breast cancer than those who sleep in total darkness. (The previous 2 studies were by Davis et al in J Natl Cancer Inst. 2001;93;1557-1562 and O'Leary et al in Am J Epidemiol. 2006;164:358-366.)

A cancer waiting to happen: