yes and no. if you're just eating goybeans you're never gonna eat enough to be really be affected. genistein and diadzein (the isoflavones/phytoestrogens in goybeans) are concentrated approximately 10x in goy protein isolate, which just so happens to be in everything in the us. they're much weaker than the 4 mammalian estrogens so in women they displace especially estradiol (the strongest mammalian estrogen) and fucks with everything from periods/pregnancy to breast development. in men it can cause moobs if you consume enough but it's difficult. it's also used as a natural hormone treatment in menopausal women. for a fun aside, goylent used to advertise "52mg of isoflavones" on their bottles until women started to notice the side effects.
Denmark