RESULTS: «No significant effects of soy protein or
isoflavone intake on T (Testosterone), SHBG (Sex Hormone Binding Globulin), free T (Testosterone), or FAI (Free Androgen Index) were detected regardless of statistical model.
In one study performed at the Seoul National University in Korea, 34 young women were studied to investigate the effect of soybean and
isoflavone intake on bone mineral density and its change among young Korean women over a period of 2 years.
Not exact matches
Intake of
isoflavone is beneficial particularly for women who are already
on the menoupausal stage.
Since soybeans contain approximately 3.5 milligrams of
isoflavones per gram of protein, and since one cup of cooked soybeans contain about 29 grams of protein, we're talking about
intake of approximately 100 milligrams of
isoflavones from 1 cup of cooked soybeans, or an amount about 40 % less than the supplemented amount that was found to have no impact
on thyroid function.
These studies — which include analysis of the
isoflavones genistein, daidzein, malonylgenistin, and malonyldaidzin — show a limited impact of soy food
intake on thyroid function, even when soy
isoflavones are consumed in supplement form at levels higher than expected from food.
Similarly, a Japanese population study of over 75 thousand men and women found a decreased risk of lung cancer among people who consumed soy products
on a regular basis (
Isoflavone intake and risk of lung cancer: a prospective cohort study in Japan.