Wtf is thia

>>35256432
Tofu is a food that has estrogen, or as OP has just informed me "phytoestrogens" in it.
Thanks OP, I like eating foods with tofu but I was scared by some articles saying it would turn me into a woman. I'll look more into what a phytoestrogen is, or maybe you could inform me.

In animal studies the phytoestrogens do have an impact on both the body and behavior. Were a bit more resilient but consuming that stuff does cascade some unique reactions.

>>35256469
phyto just means derived from a plant.

xenoestrogen is the chemical distinction, but even still. you should be afraid for the sake of your estrogen levels.

http://www.westonaprice.org/health-topics/whey-to-go-soy-protein-lowers-testosterone-in-strength-training-men/

that isn't just some buzzfeed article, it cites 24 relatively solid sources

I literally went to my doc today, and he told me that estrogen changes are minimal. As long as I eat more than just tofu, turning into a gay feman is bullshit.

Now, it's still trust, but I trust a guy who went through med school more than Joe who looked at pubmed and then declared himself all-knowing

>>35256507
>some unique reactions.
Which ones?

>>35256520

>There is a growing body of literature supporting a role for soy and its constituent isoflavones in the reduction of prostate cancer risk. Epidemiological studies conducted within multiple ethnicities have related higher soy food (4–8) and soy isoflavone (8) consumption to reduced prostate cancer risk, including one study that reported a 70% reduction in prostate cancer risk associated with consumption of soy milk among Seventh Day Adventist men (5). Serum concentrations of isoflavones have also been related to prostate cancer risk as demonstrated in a recent Japanese case-control study reporting dose-dependent inverse associations between prostate cancer risk and serum genistein, daidzein, and equol (9). In vitro studies have repeatedly demonstrated the ability of isoflavones to inhibit the growth of prostate cancer cells (10–15) and studies in rats have revealed that consumption of isoflavone-rich soy protein isolate (SPI)4 (16–19), isoflavone-rich soy flour (20,21), soy phytochemical concentrate (22), and genistin (22) inhibit prostate tumor growth.

the references they give in that anti-soy article make soy sound healthy

>Studies investigating soy foods have reported significant decreases in serum estrone (45), testosterone (46), and testosterone/estradiol (44), a significant increase in serum SHBG (44), and no significant changes in serum testosterone (44,45), free testosterone (45), DHT (44,46), 3α-AG (44), estradiol (44–46), estrone (46), or SHBG (45,46) following consumption of soy milk (45), tofu (44), or soy flour scones (46).

it either does nothing, lowers total but not free test, or lowers estrogen

>>35256777

even the one study that showed reduced test also showed reduced estrogen and in both cases it was minor and could be due to a number of other changes between baseline and the active period

http://www.nature.com/ejcn/journal/v57/n1/full/1601495a.html

they said that the soy improved markers of oxidative stress and the paper overall is about how soy helps prevent cancer and atherosclerosis

>>35256777
>the references they give in that anti-soy article make soy sound healthy
This is interpretation on your part. Soy isoflavones inhibit androgen receptor expression and anabolic processes in general. Anything that hinders the growth and progression of normal cells will often do the same for at least a couple different cancer types.

>it either does nothing, lowers total but not free test, or lowers estrogen
This claim is based on your assumed model of sex hormones. Meanwhile, the direct stimulatory effect of soy on estrogen receptors is well documented. Here is one example:

http://press.endocrine.org/doi/full/10.1210/endo.139.10.6216

Genistein, the most biologically active soy phytoestrogen, has 87% the affinity of estradiol to ERBeta. The dose-response relationship of oral soy isoflavone to blood level is roughly 1mg to .003 mM/L. According to http://www.ars.usda.gov/SP2UserFiles/Place/80400525/Data/isoflav/Isoflav_R2.pdf, that would mean one would need to consume only about 2 cups of soymilk or 50 grams soy isolate to push systemic ERbeta signaling out of physiological levels in the average adult male - https://en.wikipedia.org/wiki/Estradiol#Ranges.

>>35256844
>even the one study that showed reduced test also showed reduced estrogen and in both cases it was minor and could be due to a number of other changes between baseline and the active period
This is speculation, based on some proposed confounding factors. The true test is to feed people soy and observe the post-workout hormonal profile, which is sensitive to anabolic activity. Consider:

http://www.tandfonline.com/doi/full/10.1080/07315724.2013.770648

Here soy decreased testosterone, elevated cortisol and was neutral on estradiol. Consistent with soy stimulating muscle protein synthesis to a lesser extent than other proteins, like whey.

>http://www.nature.com/ejcn/journal/v57/n1/full/1601495a.html
>they said that the soy improved markers of oxidative stress and the paper overall is about how soy helps prevent cancer and atherosclerosis
Lowering anabolic tone itself can be anti-oxidative. As can estrogen signaling. But oxidative stress can be reduced to a greater extent with proteins that provide the precursors and anabolic stimulus necessary to encourage antioxidant synthesis (such as dairy: http://ajcn.nutrition.org/content/91/1/16.long and http://www.ncbi.nlm.nih.gov/pubmed/16575496), and this comes without the overarching estrogenic burden, so I don't think the argument in favor of soy for this purpose is relevant.