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Is soy bad for our thyroid?

I am a proud Nutriblaster!  I started about 15 months ago.  During the past 1 3/4 years I have lost about 110 lbs.  Mostly change in diet and some exercise. I have also been diagnosed with low thyroid and I take a very low dose of Levothyroxine (12.5 mcgs daily). This has been monitored over the past year and has not needed to be increased.  I have a nutriblast for breakfast.  I also have one at dinner with a piece of meat (pork chop, small rib eye or chicken).  Each nutriblast contains Soy Slender Soy Milk & Aria Women's Protein powder (which has Soy & Whey protein - label says Non-GMO) with about half spinach, zucchini, apple, some blueberries, cranberries, melon, banana, chia seeds, a squirt of orange Omega Swirl and a bit of cinnamon. Lunch is usually low sodium tuna mixed with low fat Miracle Whip or chicken salad without any bread. I tried Almond Milk and Coconut Water before but did not like them in the blasts.  I like my combo with Soy Milk and have them consistently.  This has been a big help with increased energy and weight loss however, all I read seems to say soy is evil and attacks the thyroid.  Suggestions?

2 Answers
4 years ago

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For those with underactive thyroid, it is usually advised to avoid soy. Soy contains goitrogens that prevent the uptake of iodine (and possibly thyroid medication), an important mineral for thyroid health. Check out these two articles for more info on goitrogenic foods: According to Mayo Clinic this is a debatable topic: And check out Dr. Weil's suggestion here: I'd suggest erring on the side of caution and switch your protein powder to a hemp or pea protein and use coconut milk, hemp milk, or other diary alternative instead of soy. An organic, quality whey powder is also fine. If you just can't seem to give it up, then I say cut back on the soy quite a bit and have it every now and then, not as a daily regimen. By continuing to monitor your hormone levels with your Dr. you will get a better understanding of what works for you.
Thank you very much! I will start exploring soy alternatives.

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