Almost 5 percent of the U.S. population over the age of 12 has some form of hypothyroidism. (1) Some estimates suggest up to 40 percent of the population suffers from at least some level of underactive thyroid. Women — especially older women — are the most susceptible group for developing hypothyroidism. People who are elderly or who have other existing autoimmune diseases — like type 1 diabetes, rheumatoid arthritis and celiac disease, for example — are also at a higher risk.
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.
The foods listed above do not contain any thiocyanate when they are in their living, intact state, because thiocyanates do not form until the plant is cut, crushed, or chewed. For example, fresh broccoli contains a harmless substance called glucosinolate, which turns into a thiocyanate called sulforaphane when the vegetable is damaged (see my broccoli blogpost for more information).
Levothyroxine tablets come in 12 different strengths, and it is essential to take them in a consistent manner every day. A dose of thyroid hormone that is too low may fail to prevent enlargement of the thyroid gland, allow symptoms of hypothyroidism to persist, and be associated with increased serum cholesterol levels, which may increase the risk for atherosclerosis and heart disease. A dose that is too high can cause symptoms of hyperthyroidism, create excessive strain on the heart, and lead to an increased risk of developing osteoporosis.
ADHD Bipolar Disorder Brain Health Cancer Carbohydrates carbohydrate sensitivity casein Cholesterol Constipation Crucifers Dairy Depression diabetes Dopamine fasting Fiber Food Sensitivity Fructose Fruits Gout Grains Heart Disease Histamine Hypertension Hypothyroidism IBS insulin insulin resistance iron ketogenic diet ketosis low-carbohydrate diet Meat obesity Omega-3 Processed meat Protein red meat Refined Carbohydrates Sugar Vegan Vegetables Vegetarian Weight Loss whey
Moreover, a strong relationship exists between thyroid disorders, impaired glucose control, and diabetes. Thirty percent of people with type 1 diabetes have ATD, and 12.5% of those with type 2 diabetes have thyroid disease compared with a 6.6% prevalence of thyroid disease in the general public. Both hypothyroidism and hyperthyroidism affect carbohydrate metabolism and have a profound effect on glucose control, making close coordination with an endocrinologist vital.8
1. Jonklaas J, Bianco AC, Bauer AJ, Burman KD, Cappola AR, Celi FS, et al. American Thyroid Association Task Force on Thyroid Hormone Replacement. Guidelines for the treatment of hypothyroidism: prepared by the American Thyroid Association Task Force on Thyroid Hormone Replacement. Thyroid. 2014;24:1670–1751. [PMID: 25266247] [PMC free article] [PubMed]
When a patient is suspected to have a thyroid disorder a comprehensive thyroid profile is ordered, in the form of a blood test. The test results will give precise measurements of Free T3 and T4 and their ratios to each other. If the results indicate that for example, the patient’s T3 level is too low then the patient will be checked for deficiencies in essential nutrients which are required for hormone production. Many times this will correct the thyroid without the need for prescription hormones.
Thyroiditis refers to inflammation of the thyroid gland. Lymphocytic thyroiditis is a condition in which the inflammation is caused by a particular type of white blood cell known as a lymphocyte. Lymphocytic thyroiditis is particularly common after pregnancy, and can affect up to 8% of women after they deliver their baby. In this type of thyroid disorder there usually is a hyperthyroid phase (in which excessive amounts of thyroid hormone leak out of the inflamed gland), which is followed by a hypothyroid phase that can last for up to six months. In the majority women with lymphocytic thyroiditis, the thyroid eventually returns to its normal function, but there is a possibility that the thyroid will remain underactive.
In the 1995 American Thyroid Association (ATA) guidelines, biological and synthetic thyroid hormone preparations containing T4 plus T3 were not recommended out of concern for fluctuating and often elevated serum T3 concentrations (71). In conjunction with the American Association of Clinical Endocrinologists in 2012, the ATA continued to recommend l-thyroxine monotherapy and noted that evidence does not support using synthetic combination therapies; in addition, they stated that “desiccated thyroid hormone should not be used for the treatment of hypothyroidism” (72). In 2014, the ATA recommendations evolved with the recognition that 1) serum T3 levels might not be normalized in all l-thyroxine–treated hypothyroid patients and 2) some patients remain symptomatic while receiving l-thyroxine monotherapy. Titration of l-thyroxine dose to achieve normal TSH concentrations remains a first-line approach, but trials with combination therapy can be considered. In addition, the guidelines recognize that although superiority data are lacking, some patients do experience a clinical response with desiccated thyroid preparations or combination therapy with l-thyroxine plus l-triiodothyronine (1). The European Thyroid Association has similar recommendations (2).
One root vegetable that is the exception, and which can negatively impact an underactive thyroid is cassava, a common staple in certain parts of Africa. This plant “is known to produce toxins that can slow an already underactive thyroid,” Dr. Nasr says. But, “that’s not relevant here in the United States, unless you cook cassava and you eat it every day.”
Blood sugar imbalances are major contributers to the development of hypothyroidism. When our blood sugar gets too high (hyperglycemia) the sugar molecules bind to proteins in the body and create Advanced Glycolytic Enzymes (AGEs) (56). The AGEs destroy cell membrane function and damage insulin receptor activity creating a vicious cycle of elevated blood sugar and inflammatory stress.
The thyroid gland, situated just below the Adams apple on the low part of the neck, produces the thyroid hormones in the body. The thyroid gland is shaped like a butterfly and wraps itself around the trachea with two lobes attached to a central isthmus. When you eat foods containing iodine such as salt and seafood, this thyroid gland uses the idodine to produce the thyroid hormones. There are two important types of thyroid hormones produced which would be T4 or Thyrozine and T3 or Triiodothyronine (T3). These account for most of the thyroid hormones present in the bloodstream. T3 is the more active of the hormones and it affects cellular metabolism.
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).
Seaweed — Good seaweeds are some of the best natural sources of iodine and help prevent deficiencies that disturb thyroid function. I’d recommend having some every week as part of your hypothyroidism diet. Try kelp, nori, kombu and wakame. You can look for dried varieties of these at health food stores and use them in soups, with tuna fish or in fish cakes.
Pill Systems: Natural ingredients combined together to help maintain the functioning of the thyroid gland are available in the form of pill systems. A thyroid supplement called 'thyromine' is used to increase production, thereby combating hypothyroidism. Thyromine supplements are made from natural and herbal ingredients, such as Nori (seaweed rich in iodine) and thyroid bovine powder (maintains functioning of endocrine system).
Before you read on, it’s key to know that 90% of hypo- and hyper-thyroidism results from an autoimmune disorder. (Most people do not realize this, as doctors often don’t take time to explain things.) Most hypothyroid conditions are Hashimoto’s and most hyperthyroid conditions are Graves’ Disease, which means that your immune system is attacking your thyroid. Since the immune system resides in the gut or our intestine (Did you know that?!) a lot of what you will read here is about rebuilding the digestive system.
There are medications commonly prescribed to limit the activity of the thyroid. Surgery may also be recommended as a last resort to remove all or part of the thyroid. It’s worth researching ways to treat hyperthyroidism naturally, as removing sources of inflammation from your diet and taking advantage of thyroid-supporting supplements and essential oils can help to make a big difference.
Certainly, many of the foods listed above are an important part of a healthy diet. Try to eat a varied diet so that you avoid eating large amounts of goitrogenic foods on any one day. Be especially careful about raw juicing, which can concentrate these foods. Cooking, steaming, and even blanching (such as with kale) reduce goitrogen content and are good options when you wish to consume these foods.
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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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