To stay healthy, the body needs its zzz’s. Xprog 53 download. But independent of slumber, human health also appears to require plenty of darkness — especially at night. Or so suggests a pair of new cancer studies. One found that among postmenopausal women, the lower the overnight production of melatonin — a brain hormone secreted at night, especially during darkness — the higher the incidence of breast cancer.

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The second study correlated elevated prostate cancer incidence around the world with places that have the brightes.