Phytoestrogens, human milk

Herbal products used for the relief of menopausal symptoms are purported to act by a number of different mechanisms. Phytoestrogens are plant sterols that are structurally similar to human and animal estrogen. Soy protein is a common source of phytoestrogens and can be found in products such as tofu, soy milk, soy flour, and tempeh. Various studies have demonstrated conflicting results as to the efficacy of... 

Franke AA, Yu MC, Maskarinec G et al. Phytoestrogens in human biomatrices including breast milk. Biochem. Soc. Trans. 27, 308-318, 1999. 

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