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Plasma melatonin and the hormone-dependency of human breast cancer. Meta-analysis of the risk of night shift work and breast cancer risk. Viswanathan 1 and Eva S. Nongenetic Factors in the Causation of Breast Cancer. A mammogram is a special type of x-ray of the breasts, usually done to try to find early signs of breast cancer. National Center for Biotechnology InformationU.

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Circulating Melatonin And The Risk Of Breast And Endometrial Cancer In Women

In vitro studies support an effect of melatonin particularly on breast cancer. Please review our privacy policy. Evidence for an association between urinary melatonin and breast cancer risk among premenopausal women is also sparse and has been less consistent, perhaps in part due to varying urine sampling methods used in these studies. Artificial light alters the natural release of melatonin, with highest levels of melatonin physiologically occurring during the dark night phase and relatively low levels throughout the day. Sleep and melatonin Three studies have explored the relationship between number of hours slept and production of melatonin, as measured by excretion of the primary urinary metabolite of melatonin, 6-sulfatoxymelatonin aMT6S.

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