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According to this review article: Estradiol and, to lesser degree, other estrogens, increase proliferation of breast epithelium and stroma and, consequently, increase the chances of mutation in rapidly proliferating epithelium Tamoxifen and other SERMs generally act as competitive antagonist on breast estrogen receptor, which decreases estrogen's ability ...


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First, vitamin D supplementation does not seem to increase testosterone levels. Most high quality trials see either no increase, or a very very small one: https://pubmed.ncbi.nlm.nih.gov/32446600/ Second, zinc might negate a transient exercise-induced decrease in testosterone. There is no evidence this is clinically meaningful: https://pubmed.ncbi.nlm.nih....


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