Selenium: Selenium is one the MOST IMPORTANT when it comes to healthy thyroid function! It is incorporated into key enzymes involved in several metabolic pathways implicated in thyroid hormone metabolism; additionally, it plays an antioxidant role in the regulation of the immune system. There are strong links between selenium deficiencies and auto-immune thyroid problems (48, 49).
The omega-3 fatty acids found in fatty fish such as wild salmon, trout, tuna, or sardines make this food an excellent choice for lunch or dinner, says Virginia Turner, MS, RD, LDN, clinical nutrition manager at The University of Tennessee Medical Center in Knoxville. Unmanaged hypothyroidism can increase the risk for heart disease as a result of higher levels of low-density lipoprotein (LDL), the "bad" cholesterol. "Omega-3s are known to decrease inflammation, help with immunity, and lower the risk for heart disease," she adds. Fish is also a good source of the nutrient selenium, which is most concentrated in the thyroid. Selenium also helps decrease inflammation.
The problematic compound in soy (for your thyroid) are the isoflavones. In fact, a study in the Journal of Clinical Endocrinology and Metabolism reported that researchers fed some subjects 16 mg of soy isoflavones, which is the amount found in the typical vegetarian's diet, and others 2 mg soy isoflavones, which is the amount found in most omnivore's diets.
– Gluten. Gluten is compound of glutein and gliadin proteins. Gliadin’s molecular structure is similar to the thyroid gland, so when the inmune system tags it for destruction not only destroys the protein gliadin but also attacks the thyroid tissue affecting the secretion of the thyroid hormone. The gluten from refined flour is much worse than gluten coming from natural sources as whole barley or oats.
If you have been diagnosed with both hypothyroidism and iodine deficiency, there are some things you can do to make these vegetables less harmful. Cooking them can reduce the effect that cruciferous vegetables have on the thyroid gland, and limiting your intake of these (cooked) vegetables to 5 ounces a day may help as well, since that amount appears to have no adverse effect on thyroid function.
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