Study title and authors:
Exposure of infants to phyto-oestrogens from soy-based infant formula
ProfKenneth DR Setchell PhDa, , Linda Zimmer-Nechemias MSa, Jinnan Cai MSa and James E Heubi MDb
aClinical Mass Spectrometry Center, Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, Ohio 45229, USA
bDivision of Gastroenterology and Nutrition, Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, Ohio 45229, USA
This paper can be accessed at: http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(96)09480-9/abstract
To quote the author: "The daily exposure of infants to isoflavones in soy infant-formulas is 6–11 fold higher on a bodyweight basis than the dose that has hormonal effects in adults consuming soy foods. Circulating concentrations of isoflavones in the seven infants fed soy-based formula were 13 000–22 000 times higher than plasma oestradiol concentrations in early life, and may be sufficient to exert biological effects, whereas the contribution of isoflavones from breast-milk and cow-milk is negligible".
Soy is rich in two isoflavones called genistein and daidzein. These isoflavones have phytoestrogen type effects in the human body – meaning they mimic the actions of the female hormone estrogen. This is of concern since high levels of estrogen could throw off levels of the male hormone testosterone. Testosterone is involved in sperm production and low levels of testosterone decrease male libido which could contribute to male infertility.
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Recipe of the day
Grilled Pork Chops
|Food Mall: Pork Chops|
1/4 tsp. black pepper
6 pork chops, 1 inch thick
In a shallow dish, blend all ingredients, except meat. Add pork chops.
Cover and chill 12 hours or overnight, turning meat occasionally.
To serve, remove meat from marinade. Grill over hot coals 15-20 minutes per side or until done.
Baste chops with marinade during grilling.