For what it's worth, the finding in TFA doesn't seem to have held up: "Clinical studies show no effects of soy protein or isoflavones on reproductive hormones

For what it's worth, the finding in TFA doesn't seem to have held up: "Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis"[1]. [1] https://www.sciencedirect.com/science/article/pii/S0015028209009662 https://www.sciencedirect.com/science/article/pii/S001502820...