mmh... i never liked soy, imo is not a healthy food. Maybe there is some advantage for some people (after menopause, or before to low breast cancer risk), but I dont like the way it interferes in the brain.
That's just my opinion.
I will attach a study about food and phytoestrogen content. Soy is the highest source of genistein and daidzein.
With your findings, you should be carefull for prostate risk. Because those compounds exert antiestrogenic effect in 2 ways: occupying er receptor, giving weak or no response, and also 3b-diol is inhibited. Now i see how asian women (high soy consumer) have the smallest breast average in the world, and lower cancer risk in young women