Morning Isabelle,
I've been looking around at Soy Products .... USDA Database sure has lots of information.
Do you have the isoflavones (daidzein, genistein, glycitein) breakdown (mg/100mg) for the Soy Meal that you're using. That would be a BIG Help for determining equivalents for other products that contain those isoflavones. When you say you use 1000 mg per day, I'm assuming that you use 1000 mg of Soy Meal ... and that would convert into an isoflavone breakdown based on the amount per 100 mg of meal that soy meal contains.
For example if I look at "Soybeans, flakes, defatted" it contains 37.47 daidzein, 91.22 genistein, and 14.23 glycitein per 100 mg of flakes. So for 1000 mg of flakes I'd end up with 374 daidzein, 912 genistein, and 142 glycitein.
I'm also seeing that the one that we'd like is daidzein ... cause it can metabolize into S-equol (which is similar to estradiol) BUT HERE'S THE CATCH.
"Daidzein, when consumed from soy, is transformed in some, but not all, humans to produce S-Equol [7-hydroxy-3-(49-hydroxyphenyl)-chroman], which may have some health benefits, particularly the reduction of some menopausal symptoms. Because it is a metabolite of daidzein, S-equol is not of plant origin. The molecular and physical structure of S-equol is similar to that of estradiol, the main sex hormone found in women.
The ability to transform daidzein into S-equol is based on the presence of certain intestinal bacteria. In fact, several studies indicate that only 25 to 30 percent of the adult population of Western countries produces S-equol after eating soy foods containing isoflavones, significantly lower than the reported 50 to 60 percent frequency of equol-producers in adults from Japan, Korea, or China."
So as they say "Your Mileage may vary"
BUT ... I'm willing to give it a try ... maybe I'm in that 25-30%
Karen
I got REAL Curious and it was better than working
Here's what I GUESS-TIMATED using the USDA Charts
Per 1000 mg of the Product
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Product Daidzein Genistein Glycitein Total
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Soybeans, mature seeds, 613.3 863.3 133.3 1599.8
raw (United States)
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Soy Meal, defatted, raw 807.7 1147.1 161.2 2095.8
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Soy Protein Isolate 308.1 572.8 85.4 910.5
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Soybeans, mature seeds, 621.4 757.8 133.3 1485
dry roasted (includes soy nuts)
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So if Soy Meal were the standard to be equivalent (for daidzein) you would need
1316 mg of Soybeans, mature seeds, raw (United States)
2622 mg of Soy Protein Isolate
1300 mg of Soybeans, mature seeds, dry roasted (includes soy nuts)
Seems like you could munch on Dry Roasted Soy Beans and get there pretty easily
This just doesn't seem right ... seems like anyone that eats Soy Nuts would have Big Boobies