It's important to note, however, that selenium has what doctors call a "narrow therapeutic window." In optimal amounts, it can help ensure good thyroid function and have other benefits, but is toxic in amounts not that far above "normal." This is especially important to remember if you are taking a multi-vitamin that contains zinc as well as a zinc supplement.
It’s more of a problem for people with iodine deficiency or those who eat huge amounts of goitrogens. “Goitrogens are not as active when they’re cooked, so eat them cooked,” says Fiorella DiCarlo RDN, CDN, with both clinical and research experience in medical nutrition therapy in New York City. “The last thing I want to do as a dietitian is to tell people to not eat vegetables!,” she adds. It sounds weird, but if you have a precondition, eating these vegetables raw and in large quantities could affect your thyroid.
Because it helps balance hormone levels, selenium can lower the risk for experiencing thyroid disorder during pregnancy (postpartum thyroiditis) and afterwards. Other studies have shown that when selenium deficiency is resolved through supplementation, patients experience on average 40 percent reduction in thyroid antibodies compared to a 10 percent increase in the placebo group. Selenomethionine is the preferred form of selenium supplementation as it is the form found naturally in food and about 90% of it is absorbed.
Like many people living with thyroid problems, you may wonder what the best thyroid diet to follow is. The truth is that the ideal diet for those who are living with a thyroid condition depends on personal needs and goals. If your goal is weight loss, you will want to optimize your blood sugar and leptin levels and eliminate toxins and allergens, among other things. If your goal is to support your thyroid health but not necessarily lose weight, there are some foods (such as goiter-producing vegetables and soy) that you may wish to minimize or avoid.
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).
Cruciferous vegetables, such as broccoli and cabbage, are full of fiber and other nutrients, but they may interfere with the production of thyroid hormone if you have an iodine deficiency. So if you do, it’s a good idea to limit your intake of Brussels sprouts, cabbage, cauliflower, kale, turnips, and bok choy, because research suggests digesting these vegetables may block the thyroid's ability to utilize iodine, which is essential for normal thyroid function.
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Please Note: The material on this site is provided for informational purposes only and is not medical advice. Always consult your physician before beginning any diet or exercise program.
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