Researchers at the Children’s Hospital Medical Center in Cincinnati, Ohio, performed a random, double-blind study12 to see how much phytoestrogen (meaning plant-based estrogen) 21 four-month-old infants received from soy-based formula.
They divided the infants into three groups. One received soy-based formula, one received cow milk formula, and the third had human breast milk. For the soy formulas, researchers tested five different brands, all of which showed similar soy isoflavones content and proportion of soy isolate.
They found that the infants receiving the soy formula had 214 times more genistein (a key isoflavone found in soy) in their blood than that found in the infants receiving cow’s milk, and 244 times more than that found in infants receiving breast milk.
The infants receiving soy also had 140 times more daidzen (another key isoflavone in soy) than those found in the infants receiving the cow’s milk formula, and 210 times more than in the infants taking the breast milk.
Researchers concluded that the “daily exposure of infants to isoflavones in soy infant formulas is six to 11 fold greater on a bodyweight basis than the dose that has hormonal effects in adults consuming soy foods.”
Worse yet, they go on to say that “circulating concentrations of isoflavones in the seven infants fed soy-based formula were 13,000 to 22,000 times higher than plasma oestradiol concentrations in early life, and may be sufficient to exert biological effects.”
Wow! That’s a lot of unnatural estrogen floating around in those little bodies.
And we wonder why girls are developing so much earlier than they did 20 years ago, and why boys seem to be behind the curve. Could it be all that excess estrogen?
Finally, those who are opposed to soy also point to a number of soy allergies and digestive problems soy can cause, including gas, cramping, bloating, or intestinal discomfort, all of which are signals that our bodies send us to indicate that the use of soy may not be in our best interest.