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It actually doesn't [1] [2]. But if it did, then just avoid both. [1] Clinical studies show no effects of soy protein or isoflavones on reproductive hormones i

• hokkos 8y ago
  It actually does, there is a documented event of it happening, but to be fair it is harmless for the majority of the population in resonable consumption : https://www.ncbi.nlm.nih.gov/pubmed/18558591 https://www.ncbi.nlm.nih.gov/pubmed/18558591 A 60-year-old man was referred to the endocrinology clinic for evaluation of bilateral gynecomastia of 6 months' duration. He reported erectile dysfunction and decreased libido. On further review of systems, he reported no changes in testicular size, no history of testicular trauma, no sexually transmitted diseases, no headaches, no visual changes, and no change in muscular mass or strength. Initial laboratory assessment showed estrone and estradiol concentrations to be 4-fold increased above the upper limit of the reference range. Subsequent findings from testicular ultrasonography; computed tomography of the chest, abdomen, and pelvis; and positron emission tomography were normal. Because of the normal findings from the imaging evaluation, the patient was interviewed again, and he described a daily intake of 3 quarts of soy milk. After he discontinued drinking soy milk, his breast tenderness resolved and his estradiol concentration slowly returned to normal. Also there is a clear explanation of why so much plant products have hormonal disruptors in it, to modulate the fertility of herbivore, but it's not a story NutritionFact would tell you https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1474615/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1474615/ Plants have physical and chemical mechanisms for defense from attack by animals. Phytochemical defenses that protect plants from attack by insects include antifeedants, insecticides, and insect growth regulators. Phytochemical options exist by which plants can modulate the fertility of the other major group of plant predators, vertebrate herbivores, and thereby reduce cumulative attacks by those herbivores. The success of such a defense depends upon phytochemical mimicry of vertebrate reproductive hormones. Phytoestrogens do mimic reproductive hormones and are proposed to be defensive substances produced by plants to modulate the fertility of herbivores.
  • spraak 8y ago
    So in huge quantities it rarely happens... soy is also completely optional and not necessary, so not a big concern. Avoiding animal products is laughably easy without soy.