Soy has become popular for being a food that can be highly beneficial to health. Particularly for vegetarians or those who don't like to eat much meat, soy has become a staple protein-rich food, ranging from tofu to vegetarian hamburgers. But some experts have begun to warn of soy's possible negative health implications. The largest worry is that soy has estrogenic effects and may impact the thyroid. Work closely with a doctor to determine if eating soy is a good dietary option for you.
Identification
The thyroid gland can be impacted in numerous ways, though the lowered function of the thyroid, called hypothyroidism, accounts for four out of five cases of thyroid disease, according to Dr. Alan Christianson in his book, "The Complete Idiot's Guide to Thyroid Disease." He adds that more than 24 million Americans are estimated to suffer from hypothyroidism, which occurs when the levels of hormones that oversee energy in the cells, primarily T3 and T4, fall below normal levels.
Effects
The thyroid can be negatively impacted by soy if you suffer from hypothyroidism, says Dr. Ken Blanchard in his book, "What Your Doctor May Not Tell You About Hypothyroidism." This is because soy is a phytoestrogen and goitrogen, which means it acts like an estrogen and can interfere with thyroid hormone absorption and function. Blanchard says that when consumed in large quantities, soy can contribute to hypothyroidism.
Research
In an article published in the June 2002 issue of "Environmental Health Perspectives," author Daniel R. Doerge reviews the evidence linking soy, estrogenic effects and goiters. He found that iodine deficiency greatly increases the effects of soy on the thyroid, while iodine supplementation can help protect the thyroid from soy. Therefore, he believes that the relationship between iodine status and thyroid function is the most important aspect of whether or not soy will negatively impact the thyroid.
Considerations
If you think you are suffering from a thyroid condition, see your doctor as soon as possible, because you may need thyroid medication. The thyroid affects many systems in the body, including hormones, metabolism and brain function, and a disorder can lead to further disease if not treated properly. If you do consume soy regularly, getting your thyroid tested over time may help to see if this food is impacting you.
References
- "The Complete Idiot's Guide to Thyroid Disease"; Alan Christianson, M.D.; 2011
- "What Your Doctor May Not Tell You About Hypothyroidism"; Ken Blanchard, M.D.; 2004
- "Integrative Medicine"; David Rakel; 2007
- "Environmental Health Perspectives"; Goitrogenic and Estrogenic Activity of Soy Isoflavones; Daniel R. Doerge; June 2002
Member Comments