Women's Health Weekly
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Breast Cancer Risk Factors
Urinary melatonin levels studied as predictor of breast cancer
September 15th, 2005
Urinary melatonin levels were studied as a predictor of breast cancer in women. "Exposure to light at night suppresses melatonin production, and night-shift work (a surrogate for such exposure) has been associated with an increased risk of breast cancer. However, the association between circulating melatonin levels and breast cancer risk is unclear," scientists in the United States report. "In a prospective case-control study nested within the Nurses' Health Study 11 cohort, Schernhammer and Hankinson measured the concentration of the major melatonin metabolite, 6-sulphatoxymelatonin (aMT6s), in the first morning urine of 147 women with invasive...
Source: Women's Health Weekly (2005-09-15)
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