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. 2011 Nov;63(8):1361-6.
doi: 10.1080/01635581.2011.609306. Epub 2011 Nov 1.

Milk Stimulates Growth of Prostate Cancer Cells in Culture

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Milk Stimulates Growth of Prostate Cancer Cells in Culture

Patricia L Tate et al. Nutr Cancer. .

Abstract

Concern has been expressed about the fact that cows' milk contains estrogens and could stimulate the growth of hormone-sensitive tumors. In this study, organic cows' milk and two commercial substitutes were digested in vitro and tested for their effects on the growth of cultures of prostate and breast cancer cells. Cows' milk stimulated the growth of LNCaP prostate cancer cells in each of 14 separate experiments, producing an average increase in growth rate of over 30%. In contrast, almond milk suppressed the growth of these cells by over 30%. Neither cows' milk nor almond milk affected the growth of MCF-7 breast cancer cells or AsPC-1 pancreatic cancer cells significantly. Soy milk increased the growth rate of the breast cancer cells. These data indicate that prostate and breast cancer patients should be cautioned about the possible promotional effects of commercial dairy products and their substitutes.

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