>>140644
And yes, there is estrogen in milk (testosterone too). It's almost as if milk came from a living creature that makes hormones. Did you know men make estrogens too? Uh oh, what do we do about that? It doesn't help when many people poorly understand the biological role of estrogens to begin with.
Meurant, G. (1995). Handbook of Milk Composition. Elsevier Science.
https://books.google.com/books?id=MAbQjY0ppgQC&pg=PA479&source=gbs_selected_pages&cad=3#v=onepage&q&f=false
There are many reasons people are extremely cautious about excessive estrogens, and I agree with them. Normal living isn't possible without some estrogen though, as male fertility depends on it. The reason I point this out because it establishes that the mere presence of something estrogenic isn't the end of the world. The question then becomes whether or not hormonal influences are in balance—not whether or not anything estrogenic is there in any amount. The other thing to establish is whether or not these are natural estrogens and not something biohazardous like the garbage found in many plastics.
Zhou, Qing, et al. Estrogen action and male fertility: roles of the sodium/hydrogen exchanger-3 and fluid reabsorption in reproductive tract function. Proceedings of the National Academy of Sciences 98.24 (2001): 14132-14137.
https://doi.org/10.1073/pnas.241245898
>Estrogen receptor α (ERα) is essential for male fertility. Its activity is responsible for maintaining epithelial cytoarchitecture in efferent ductules and the reabsorption of fluid for concentrating sperm in the head of the epididymis. These discoveries and others have helped to establish estrogen's bisexual role in reproductive importance.
There are other things which have estrogenic influences, and they don't necessarily act like estrogen simply by acting on an estrogen receptor. Estrogen creates edema or water retention, and other substances which do similar things could be seen as having estrogenic qualities:
Chan, Pak Hoo, and Robert A. Fishman. Brain edema: induction in cortical slices by polyunsaturated fatty acids. Science 201.4353 (1978): 358-360.
https://doi.org/10.1126/science.663662