Get Pregnant Naturally

Get Pregnant Naturally
".....Utilizing Traditional Chinese Medicine in Tonifying Energy flow to the Reproductive System Channels In Men and Women for Natural Conception, including Couple Who were diagnosed with Unexplained causes of Infertility...." Chantel M.

Saturday, October 1, 2011

Soy and Thyroid Hormones

Posted by Chantel M. Contributed by US National Library of Medicine National Institutes of Health

The effects of Soy in thyroid hormones are always a controversial issue, there are conflicted results in number studies. Like other foods, do not over dose them.

(1) In the study of "Seaweed and soy: companion foods in Asian cuisine and their effects on thyroid function in American women" by Teas J, Braverman LE, Kurzer MS, Pino S, Hurley TG, Hebert JR., posted in US National Library of Medicine National Institutes of Health, researchers found that Soy supplementation did not affect thyroid end points. Seven weeks of 5 g/day seaweed supplementation was associated with a small but statistically significant increase in TSH. Soy protein isolate supplementation was not associated with changes in serum thyroid hormone concentrations.

(2) Anothers study of "Isoflavone supplements do not affect thyroid function in iodine-replete postmenopausal women" by Bruce B, Messina M, Spiller GA., posted in US National Library of Medicine National Institutes of Health, researchers wrote that . In a randomized, double blind, placebo-controlled study, we investigated the effect on thyroid function of a daily supplement containing 90 mg (aglycone weight) of total isoflavones/day versus placebo in 38 postmenopausal women, 64-83 years old, not on hormone replacement therapy. Serum thyroid-stimulating hormone (TSH), thyroxine (T4), and triiodothyronine (T3) were measured at baseline and after 90 and 180 days. In the supplement group, at baseline and 6 months, TSH (micro U/ml), T4 (nM), and T3 (nM) levels (mean +/- SE) were 3.00 +/- 0.44, 149.00 +/- 5.04, and 1.53 +/- 0.13, respectively, and 3.49 +/- 0.52, 154.52 +/- 2.09, and 1.78 +/- 0.12, respectively. In the control group, levels at baseline and at 6 months were 3.35 +/- 0.51, 145.39 +/- 6.69, and 1.55 +/- 0.18, respectively, and 3.63 +/- 0.57, 153.77 +/- 6.64, and 1.75 +/- 0.10, respectively. Intragroup differences for all three measures were statistically indistinguishable at 6 months, and levels were similar between the isoflavone supplement and placebo groups at each measurement. These results indicate that in this group of healthy iodine-replete subjects, soy isoflavones do not adversely affect thyroid function.


  1. Having had thyroid issues for the last 20 years this was very good to know. thanks.


  2. I did not understand most of what your short study was about. I did notice you did not specify if the soy you used in your study was organic or the genetically modified organism (GMO) we have in most of the food we buy in the United States. Could you please explain in a more understandable way for this Vietnam Veteran?