Maintaining healthy hormone levels can be a challenge but it is possible. Following a diet that supports the thyroid is a good place to start. It should provide certain nutrients, like iodine and selenium, that naturally support normal thyroid health. Additionally, it's important to be mindful of other types of food that can actually interfere with hormone balance and thyroid function. Let's take a closer look at how you can use the power of nutrition to support your thyroid and encourage normal hormone balance.
What Is Hypothyroidism?
When the thyroid functions normally, it produces the metabolism-regulating hormones T3 and T4. When it's not functioning normally, a thyroid disorder may be to blame. Thyroid disorders typically manifest as the thyroid being too active, or not active enough. Hypothyroidism is when the thyroid is under-active and doesn't synthesize enough thyroid hormone. Aside from making you feel generally unwell, it can produce other symptoms such as sensitivity to cold, dry skin, fatigue, muscle cramps, constipation, depression, and voice changes. Hypothyroidism is relatively common in middle-age and older adults; according to some estimates, it affects up to 20% of women over the age of 60. It's common for affected people to have low energy levels, a slow metabolism, and difficulty maintaining a desirable body weight.[1, 3]
Health Benefits of Following a Thyroid Diet
Diet has a tremendous impact on thyroid health and function. Some foods provide the nutrients the thyroid needs. Other types of food may impair thyroid function. It's important to consume enough of the former and less of the latter. Just as you can't ignore the effect your dietary choices have on your waistline, you can't ignore the effect of nutrition as it helps, or hinders, the thyroid. If you're unsure of the status of your thyroid, a doctor can use blood tests to determine your standing. People who experience thyroid problems should get tested every five years, beginning at age thirty-five.
Vitamins and Minerals Essential for Thyroid Health
Normal thyroid function and hormone production occur when the thyroid is healthy and it's provided the right nutrition. Iodine, iron, selenium, and zinc are all especially important for the thyroid. It's a good idea to take inventory of your nutritional intake and determine if you're getting enough of each. Iodine deficiency is a common, contributing factor for hypothyroidism, and, as a global problem, affects as many as two billion people. Iodine is an essential component for thyroid hormone synthesis and actually becomes a part of the thyroid hormone itself. It’s impossible for the thyroid to produce hormones without iodine. A healthy, balanced diet, especially one that includes foods that are a good source of iodine, should provide the minimum amount of iodine your body needs, which is 150 micrograms daily (conversely, exceeding 400 micrograms of iodine per day can produce negative outcomes). If your diet doesn't provide enough iodine, an iodine supplement can help bridge the gap between your intake and requirements.
Selenium is the second most crucial mineral for thyroid hormone production. In fact, gram for gram, the thyroid gland has the highest concentration of selenium in the body. Like iodine, selenium also becomes a part of thyroid hormones. Selenium is also a component of proteins, known as selenoproteins, that act as antioxidants to help protect the thyroid gland from oxidative stress.
It’s not possible to discuss thyroid health without considering the importance of vitamin B-12. In one study, 40% of people who suffered from hypothyroidism also had a B-12 deficiency. A B-12 supplement can help people who are deficient in B-12 or suffer from hypothyroidism. Foods that are rich in B-12, while few and far between, and not often vegan-friendly, are one way to consume vitamin B-12. Again, supplementation may be something to consider if your diet doesn't provide sufficient B-12.
There are a number of other trace elements that contribute to thyroid health; zinc and iron are especially worth mentioning. Zinc is a crucial component of the thyroid hormone receptors that help regulate metabolism and heart rate. Iron boosts the efficacy of iodine. Following a healthy, balanced diet that provides a complete spectrum of all the nutrients your body needs is a good strategy for supporting thyroid health.
Foods That Help Maintain Healthy Thyroid Levels
Seaweed is a great source of iodine and considered one of the most beneficial foods for thyroid health. Believe it or not, not all seaweed is the same; there are a number of varieties to try. Wakame and nori can usually be found in the international section of your grocery store. Wakame is the delicious green seaweed you see swirling around miso soup. If you’ve ever tried sushi rolls, nori is the dark green sheet upon which the ingredients are arranged. Kelp and kombu, two other varieties, are used to flavor soup stock. If you’re an advanced seaweed consumer or feeling adventurous, try making a seaweed salad with kelp. But, beware, as it can be an acquired taste! Fruits and vegetables can provide iodine but the content varies considerably depending on the geographic region and nutrient content of the soil. Antioxidant-rich foods like dark green leafy vegetables and berries can protect against oxidative stress. Although too much iodine can be a bad thing, it's virtually impossible to get too much from eating food. Many foods are high in selenium. Brazil nuts, pinto beans, and button mushrooms are just a few. Six Brazil nuts offer 774% of your daily selenium needs. Eating just a few every day will provide more than enough selenium. Selenium toxicity is possible with high doses. Whether you get selenium from food or supplements, it's best to stay within dietary guidelines.
Various cereals and nut milk, like almond and hemp, are fortified with B-12. Other sources of B-12 include meat, dairy, and eggs, but, beware, as these foods also promote inflammation.[17, 18] Inflammation is often present with thyroid disorders. In fact, inflammation can actually cause hypothyroidism.
Herbs That Support Thyroid Health
Herbs that support the thyroid include coleus (Coleus forskohlii), guggul (Commiphora mukul) and bladderwrack (Fucus vesiculosus). It’s best to talk to your doctor before consuming these herbs as they may interfere with certain medications.
Foods to Avoid on a Thyroid Diet
Some foods, such as cruciferous vegetables, can actually work against the thyroid. When the body metabolizes the glucosinolates found in vegetables like broccoli and cabbage, goitrin compounds are produced. Goitrin interferes with the synthesis of thyroid hormone. Cruciferous vegetables also contain indole glucosinolates which, when metabolized, yield a product that traps dietary iodine. It can result in an iodine deficiency, even if you consume enough iodine.
Soy is another goitrogenic food. Common sources include tofu, soy sauce, and soy milk. The main isoflavone in soy, genistein, deactivates human thyroid peroxidase (TPO), an enzyme, and interferes with T3 and T4 synthesis. However, a pre-existing iodine deficiency must be present for this effect to significantly lower thyroid hormone production. Older adults, especially women, should avoid soy products if they have an iodine deficiency.
People who take the synthetic T4 hormone L-T4 should avoid coffee, as it interferes with absorption. If you can’t give up coffee, it’s best to avoid coffee at least an hour before or after taking synthetic thyroid hormone medication. The caffeine is not the culprit, so you can trade your morning coffee for tea and still avoid the coffee-sourced compound that binds to L-T4.
Alcohol is royally toxic to thyroid cells and horrible for thyroid health. It suppresses thyroid function and affects T3 levels. Clearly, those who suffer from low thyroid hormone should avoid alcohol at all costs.
A Thyroid Diet Is Essential for Healthy Thyroid Functioning
Whether you’re trying to boost an underactive thyroid or just want to be on top of your thyroid health, following the right diet is key to helping manage frustrations like poor-quality sleep and weight gain. Ideally, most people should be able to get all the vitamins and minerals they need from diet alone. However, if your diet isn't balanced or doesn't consistently provide the completed spectrum of nutrients your body requires, supplementation may be the key. If you’re one of these people, I recommend the Thyroid Health Kit™. It’s specially formulated to nourish your thyroid gland and contains our three best supplements for maintaining a healthy thyroid — nascent iodine, selenium, and vitamin B-12.
- Garber, Jeffrey R., et al. “Clinical Practice Guidelines for Hypothyroidism in Adults: Cosponsored by the American Association of Clinical Endocrinologists and the American Thyroid Association.” Thyroid 22.12 (2012): 1200–1235. Web. 16 Aug. 2016.
- Surks, Martin I, et al. “Subclinical Thyroid Disease.” JAMA 291.2 (2004): 228–238. Web. 16 Aug. 2016.
- “Pregnancy and thyroid disease.” 29 July 2016. Web. 16 Aug. 2016.
- Ladenson, Paul W, et al. “American Thyroid Association Guidelines for Detection of Thyroid Dysfunction.” Archives of Internal Medicine 160.11 (2000): 1573–1575. Web. 16 Aug. 2016.
- Zimmermann, Michael B, Pieter L Jooste, and Chandrakant S Pandav. “Iodine-Deficiency Disorders.” 372.9645 (2016): 1251–1262. Web. 16 Aug. 2016.
- Arthur, John R, and Geoffrey J Beckett. “Thyroid Function.” British Medical Bulletin 55.3 (1999): 658–668. Web. 16 Aug. 2016.
- Köhrle, Josef. “The Trace Element Selenium and the Thyroid Gland.” Biochimie 81.5 (1999): 527–533. Web. 16 Aug. 2016.
- Köhrle, Josef, and Roland Gärtner. “Selenium and Thyroid.” Best Practice & Research Clinical Endocrinology & Metabolism 23.6 (2009): 815–827. Web. 16 Aug. 2016.
- Zimmermann, MB, and J Köhrle. “The Impact of Iron and Selenium Deficiencies on Iodine and Thyroid Metabolism: Biochemistry and Relevance to Public Health.” Thyroid : official journal of the American Thyroid Association. 12.10 (2002): 867–78. Web. 16 Aug. 2016.
- Olivieri, Oliviero, et al. “Selenium, Zinc, and Thyroid Hormones in Healthy Subjects.” Biological Trace Element Research 51.1 (1996): 31–41. Web.
- Jabbar, A, et al. “Vitamin B12 Deficiency Common in Primary Hypothyroidism.” JPMA. The Journal of the Pakistan Medical Association. 58.5 (2008): 258–61. Web. 16 Aug. 2016.
- “Office of dietary supplements - iodine.” 24 June 2011. Web. 16 Aug. 2016.
- Publications, Harvard Health. Foods that fight inflammation - Harvard health. Harvard Health, 5 Apr. 2016. Web. 16 Aug. 2016.
- Heller, Jacob L, et al. Iodine poisoning: MedlinePlus medical encyclopedia. 23 Jan. 2015. Web. 24 Aug. 2016.
- Nast, Condé. Nuts, brazil nuts, dried, unblanched nutrition facts & calories. 2014. Web. 16 Aug. 2016.
- MacFarquhar, Jennifer K., et al. “Acute Selenium Toxicity Associated with a Dietary Supplement.” 170.3 (2010): n.pag. Web. 24 Aug. 2016.
- D, Michael Greger M. How does meat cause inflammation? NutritionFacts.org, 30 Aug. 2014. Web. 16 Aug. 2016.
- URIBARRI, JAIME, et al. “Advanced Glycation End Products in Foods and a Practical Guide to Their Reduction in the Diet.” 110.6 (n.d.): n.pag. Web. 16 Aug. 2016.
- A, 2013. Thyroiditis. University of Maryland Medical Center, 1997. Web. 16 Aug. 2016.
- “Hypothyroidism.” 29 July 2016. Web. 16 Aug. 2016.
- State, Oregon. Cruciferous vegetables. 2016. Web. 16 Aug. 2016.
- Truong, Thérèse, et al. “Role of Dietary Iodine and Cruciferous Vegetables in Thyroid Cancer: A Countrywide Case–control Study in New Caledonia.” Cancer Causes & Control 21.8 (2010): 1183–1192. Web.
- Doerge, Daniel R, and Daniel M Sheehan. “Goitrogenic and Estrogenic Activity of Soy Isoflavones.” 110.Suppl 3 (2002): n.pag. Web. 16 Aug. 2016.
- “Goitrogenic and Estrogenic Activity of Soy Isoflavones.” 110.Suppl 3 (2002): n.pag. Web. 16 Aug. 2016.
- Wegrzyn, Nicole M. “Malabsorption of L-T4 Due to Drip Coffee: A Case Report Using Predictors of Causation.” Journal of the Academy of Nutrition and Dietetics 116.7 (1076): 1073–1075. Web. 16 Aug. 2016.
- Balhara, Yatan Pal Singh, and Koushik Sinha Deb. “Impact of Alcohol Use on Thyroid Function.” 17.4 (2013): n.pag. Web. 16 Aug. 2016.
- Kelly, GS. “Peripheral Metabolism of Thyroid Hormones: A Review.” Alternative medicine review : a journal of clinical therapeutic. 5.4 (2000): 306–33. Web. 16 Aug. 2016.
- A, 2013. Hypothyroidism. University of Maryland Medical Center, 1997. Web. 16 Aug. 2016.
†Results may vary. Information and statements made are for education purposes and are not intended to replace the advice of your doctor. If you have a severe medical condition or health concern, see your physician.