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Objective: Women with a moderate intake of alcohol have higher concentrations of sex steroids in serum, and higher risk of developing breast cancer, compared to non-drinkers. In the present study, we investigate the relationships between alcohol consumption and serum levels of sex steroids and sex-hormone binding globulin (SHBG) in 790 pre- and 1,291 post-menopausal women, who were part of the European Prospective Investigation into Cancer and Nutrition (EPIC). Methods: Serum levels of testosterone (T), androstenedione (Δ 4 ), dehydroepiandrosterone sulphate (DHEAS), estrone (E 1 ), estradiol (E 2 ) and SHBG were measured by direct immunoassays. Free T (fT) and free E 2 (fE 2 ) were calculated according to mass action laws. Current alcohol intake exposure to alcohol was assessed from dietary questionnaires. Results: Pre-menopausal women who consumed more than 25 g/day of alcohol had about 30% higher DHEAS, T and fT, 20% higher Δ 4 and about 40% higher E 1 , concentrations compared to women who were non-consumers. E 2 , fE 2 and SHBG concentrations showed no association with current alcohol intake. In post-menopausal women, DHEAS, fT, T, Δ 4 , and E 1 concentrations were between 10% and 20% higher in women who consumed more than 25 g/day of alcohol compared to non-consumers. E 2 or fE 2 were not associated with alcohol intake at all. SHBG levels were about 15% lower in alcohol consumers compared to non-consumers. Conclusion: This study supports the hypothesis of an influence of alcohol intake on sex hormone concentrations in blood. © Springer Science+Business Media B.V. 2006.

Original publication

DOI

10.1007/s10552-006-0041-7

Type

Journal article

Journal

Cancer Causes and Control

Publication Date

01/09/2006

Volume

17

Pages

1033 - 1043