Re: Soy and Thyroid Function
04/24/05 10:11 AM
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Kandee
Reged: 05/22/03
Posts: 3206
Loc: USA, Southern California
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Quote:
Yes, consuming soy impacts thyroid function--that's the verdict/consensus of the experts...WITH ONE EXCEPTION. What is this exception? FERMENTED SOY. Fermented soy does not impact thyroid function. Fermented soy, and that's generally how the Japanese consume it, does not impede thyroid function. I suppose, though, soy yogurt would be okay, because bacterial culture would cause fermentation.
Examples: miso, soy sauce, tempeh...you can even buy fermented soy protein powder.
Also re: thyroid and goiterons. Certain foods contain goiterons (check spelling) which are bad for hypothyroid. These are generally cruciferous veggies...which most of us have a problem with (broccoli/cabbage/brussels sprouts, etc.) Cooking releases/negates these goiterons...eating them raw (YAH RIGHT!) does not and therefore negatively impacts thyroid function. So, fermented soy is okay--unfermented soy is nasty for hypothyroid. Incidentally, unfermented and also uncooked soy/tofu impedes
thyroid function.
Yes, soy not only is a goitergen but diminishes the affects of thyroid medication, the same way Calcium does if consumed to close to the time you take your daily thyroid medications. Cruciferus veggies act the same way unless cooked to death. And there are some new studies out that show green tea should be avoided by those with thyroid disease as well.
Personally, I'm flat out intolerant of all soy, whether it be in the fermented form or not. I avoid all soy dairy subs. There are enough rice and nut dairy subs out there that one does not have to consume soy if it is detrimental to their health in some way. However, because of it's estrogenic affect it can be helpful for many women in peri-menopause and menopause, not to mention the high calcium, protein and mineral contents. Here is a thread started many moons ago. Lots of reading here, both pro and con. Kandee
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