Hypothyroidism is a complex disorder that can stem from a number of different causes, including: 1  The thyroid may fail to produce enough thyroid hormone as a result of an autoimmune response against the thyroid (Hashimoto's thyroiditis) or other problems with the function of the thyroid gland itself.
Chicken, lamb, pork, and turkey also are good sources of iron. Meat contains heme iron, which is easier for the body to absorb, meaning you get more of the iron from these foods. Lean sources of beef are recommended.
Each of these uses of copper also requires iron, and for this reason, the symptoms of copper deficiency can mimic those of low iron intake. Lentils, and sesame seeds are just a few examples of World's Healthiest Foods rich in both iron and copper.