For comparison,
the total isoflavone content in mg in 100 g of some soy foods: tempeh 60.61 edamame 48.95 tofu 30.41 soymilk 10.73
One hundred grams of soy protein contains about 97 g
total isoflavones according to USDA - Iowa State University Database on the Isoflavone Content of Foods 1999.
Researchers found that soy formulas provide infants with a daily dose rate of 3 mg / kg body weight
total isoflavones, «which is maintained at a fairly constant level between 0 - 4 months of age....
Not exact matches
One analysis of 11 studies showed that soy
isoflavones reduced
total cholesterol by 3.9 mg / dL and «bad» LDL cholesterol by 5 mg / dL (65).
study showed «no significant correlation between soy product as well as soy
isoflavone intake and serum IGF - 1 or IGFBP - 3 levels after controlling for age,
total energy, percent body fat, and education level. . .»
While typical serving sizes (one to three of soy foods, or less than 25g of soy protein from non-concentrated sources like tofu) have not been shown to be problematic, amounts more than that (
totaling around 100 mg
isoflavones or greater daily) could negatively impact testosterone.