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Do non-GMO soybeans really contain less phytoestrogens than conventional soybeans?

by (1005)
Updated September 16, 2014 at 8:07 PM
Created April 13, 2013 at 10:01 PM

I've lately been trying to persuade my family to stop drinking soymilk, to which my family is highly addicted. I've been trying to explain that soymilk is high in phytoestrogens, but my brother insists that it's only GMO soybeans that are high in phytoestrogens, and the Silk soymilk we keep in the house is from Non-GMO soybeans, which my brother says are lower in phytoestrongens. The whole thing sounds fishy, as I thought ALL soybeans contained phytoestrogens. Do non-GMO soybeans really contain less phytoestrogens than GMO soybeans?

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41297 · April 14, 2013 at 12:47 PM

1) GMO soy is not pesticide resistent, as pesticides can't kill soy. 2) GMO soy is herbicide resistent, as herbicides can kill non-GMO soy. 3) Roundup (glyphosate), an herbicide, is probably not an endocrine receptor.

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134 · April 14, 2013 at 1:36 AM

That didn't make a lot of sense. I encourage you to reread what you said. Granted, I did mistakenly say pesticide resistance when I meant pest-resistance.

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41297 · April 13, 2013 at 11:43 PM

Interesting find. I won't expect GMOs to be higher in phytoestrogens than non-GMOs. It makes sense that they might be low in fact. As they're probably a more selective variety than other soy strains, possible bred for higher protein, fat content than other soy.

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41297 · April 13, 2013 at 11:40 PM

GMO soy shouldn't have any more pesticide use than non-GMO soy. As GMO soy is bred to be herbicide-resistent, not pesticide-resistent. Pesticide-resistance in a plant really isn't necessary because they're not insects. GMO plants are bred to produce their own herbicides a la BT corn.

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2 Answers

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32518 · April 13, 2013 at 10:40 PM

Google is a fine tool...just saying'. ;)

So I was curious & found this study which shows that GMO soybeans may actually be LOWER in phytoestrogens.

http://www.mindfully.org/GE/Phytoestrogen-Alteration-GM-Soybeans1jul99.htm

Regardless, soy is not fantastic for many other reasons. Lots of info out there if you need supporting data.

32f5749fa6cf7adbeb0b0b031ba82b46
41297 · April 13, 2013 at 11:43 PM

Interesting find. I won't expect GMOs to be higher in phytoestrogens than non-GMOs. It makes sense that they might be low in fact. As they're probably a more selective variety than other soy strains, possible bred for higher protein, fat content than other soy.

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134 · April 13, 2013 at 10:55 PM

Answer is no, unless the soybean is genetically modified to have less, which I do not know of any that are. However, let me also clarify this: genetically modified does not mean it's bad for you. But, the problem with most (if not all) of GMO's on the market is that they are altered to withstand mass amounts of pesticide use. Pesticides often present themselves as hormone disruptors, so they often also inter with our endocrine system. So they essentially they maybe receiving less interference with their endocrine system by purchasing non-GMO, but I'm thinking that isn't nearly enough. For me, even in small quantities, soy and soy products take a noticable effect on my mood; the difference between a vitamin D supplement with and without soy lecithin is phenomenal!

32f5749fa6cf7adbeb0b0b031ba82b46
41297 · April 14, 2013 at 12:47 PM

1) GMO soy is not pesticide resistent, as pesticides can't kill soy. 2) GMO soy is herbicide resistent, as herbicides can kill non-GMO soy. 3) Roundup (glyphosate), an herbicide, is probably not an endocrine receptor.

B120d28d9620626012de121b6075ce51
134 · April 14, 2013 at 1:36 AM

That didn't make a lot of sense. I encourage you to reread what you said. Granted, I did mistakenly say pesticide resistance when I meant pest-resistance.

32f5749fa6cf7adbeb0b0b031ba82b46
41297 · April 13, 2013 at 11:40 PM

GMO soy shouldn't have any more pesticide use than non-GMO soy. As GMO soy is bred to be herbicide-resistent, not pesticide-resistent. Pesticide-resistance in a plant really isn't necessary because they're not insects. GMO plants are bred to produce their own herbicides a la BT corn.

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