Zinc is another key nutrient for your thyroid—your body needs it to churn out TH. Take in too little zinc, and it can lead to hypothyroidism. But get this: If you develop hypothyroidism, you can also become deficient in zinc, since your thyroid hormones help absorb the mineral, explains Ilic. And when that happens, you may also experience side effects like severe alopecia, an autoimmune condition that attacks hair follicles and makes it fall out in clumps, according to one 2013 report.
You probably get enough zinc already (most people in the U.S. do), but if you have a poor diet or a GI disorder that interferes with your ability to absorb zinc, you might be at risk for a deficiency, says Ilic. Meats are a good source: One 3-ounce serving of beef chuck roast contains 7 milligrams; a 3-ounce beef patty contains 3 milligrams; and a 3-ounce serving of dark chicken meat contains 2.4 milligrams.
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