According to: https://www.mensjournal.com/health-fitness/how-much-soy-can-you-really-eat-before-it-affects-your-testosterone-w479484
According to Jason Kovac, MD, PhD, of the Men’s Center in Indianapolis, Indiana, “Soy proteins contain significant amounts of the phytoestrogen isoflavonoids that change to estrogenic substances with potential hormonal properties.” But eating plant estrogens doesn’t mean you’re going to grow man boobs.
Kovac highlights the 2010 meta-analysis published in Fertility and Sterilityas the best literature to consider, where researchers reviewed 15 placebo-controlled treatments and 32 reports. The results suggested that soy protein and isoflavones do not affect testosterone levels in men — regardless of age.
With that said you will also find a number of articles claiming phytoestrogen isoflavonoids are safe and effective. I did see two studies from NIH/PubMed taking opposite sides of the debate.
But it seems pretty clear they raise estrogen levels in men while leaving testosterone unchanged.
Comments
Mixed.
According to: https://www.mensjournal.com/health-fitness/how-much-soy-can-you-really-eat-before-it-affects-your-testosterone-w479484
According to Jason Kovac, MD, PhD, of the Men’s Center in Indianapolis, Indiana, “Soy proteins contain significant amounts of the phytoestrogen isoflavonoids that change to estrogenic substances with potential hormonal properties.” But eating plant estrogens doesn’t mean you’re going to grow man boobs.
Kovac highlights the 2010 meta-analysis published in Fertility and Sterilityas the best literature to consider, where researchers reviewed 15 placebo-controlled treatments and 32 reports. The results suggested that soy protein and isoflavones do not affect testosterone levels in men — regardless of age.
With that said you will also find a number of articles claiming phytoestrogen isoflavonoids are safe and effective. I did see two studies from NIH/PubMed taking opposite sides of the debate.
But it seems pretty clear they raise estrogen levels in men while leaving testosterone unchanged.
.