Goitrogen Foods — People with hypothyroidism may want to stay away from eating large amounts of raw Brassica vegetables like broccoli, cauliflower, cabbage, kale, soy and Brussels sprouts. These vegetables might impact thyroid function because they contain goitrogens, molecules which impair thyroid perioxidase. (11) When consuming these cruciferous vegetables, it’s best to steam them for 30 minutes before consuming and keep portions moderate in size. These pose more of a risk for people with iodine deficiencies.
The thyroid controls how your body's cells use energy from food, a process called metabolism. Among other things, your metabolism affects your body’s temperature, your heartbeat, and how well you burn calories. If you don't have enough thyroid hormone, your body processes slow down. That means your body makes less energy, and your metabolism becomes sluggish.
It is absolutely critical for any physician who is treating someone with a thyroid disorder to test for thyroid antibodies. Unfortunately, few mainstream medical doctors test for thyroid anti-bodies and so most do not ever get the proper diagnosis. In the medical system, an auto-immune condition, a sluggish thyroid, a burned out pituitary gland and a T4-T3 conversion problem are all treated the same way, with synthetic T4 such as synthroid or a T3 medication like levothyroxin.
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.
According to some estimates, 40 percent of the population suffers with some form of low thyroid function. 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.
Symptoms of hypothyroidism often develop gradually and can sometimes take years to manifest. Women in their fifties and older are more likely to have hypothyroidism then men; however, teenagers, children and even infants can be affected by this condition. Typical signs that you may have hypothyroidism include increasing fatigue and weakness, often with unintentional weight gain. Skin can become dry, rough and pale, with hair loss and dry, brittle nails. Other frequent problems are sensitivity to cold, muscle or joint aches, constipation, depression, irritability, memory loss, abnormal menstrual cycles with heavy blood flow, and decreased sex drive.
“Some evidence suggests that soy foods, by inhibiting absorption, may increase the dose of thyroid hormone required by hypothyroid patients. However, hypothyroid adults need not avoid soy foods. In addition, there remains a theoretical concern based on in vitro and animal data that in individuals with compromised thyroid function and/or whose iodine intake is marginal, soy foods may increase risk of developing clinical hypothyroidism. Therefore, it is important for soy food consumers to make sure their intake of iodine is adequate.” [Messina]
Giving appropriate doses of T3 is trickier than appropriately dosing T4. T4 is inactive, so if you give too much there is no immediate, direct tissue effect. T3 is a different story, though, as it is the active thyroid hormone. So if you give too much T3, you can produce hyperthyroid effects directly—a risk, for instance, to people with cardiac disease.
The NIH studied the link between hypothyroidism and small intestine problems. These problems included an overgrowth of bacteria, such as yeast. Probiotic supplements contain live bacteria that can help keep your stomach and intestines healthy. Besides supplement forms, fermented food and drink, such as kefir, kombucha, raw cheese, and yogurt contain useful probiotics.
One of the most powerful things you can do to help your health and metabolism is to drink enough water. Water helps your metabolism function more efficiently and can help reduce your appetite, get rid of water retention and bloating, improve your digestion and elimination, and combat constipation. Some experts even say that we should drink one ounce of water per pound of scale weight.
An unhealthy gut environment can contribute to nutrient deficiencies and raise autoimmune activity in the body. Gut inflammation can be triggered by food sensitivities or allergies, including those to gluten and dairy. Other causes of a damaged gut are high stress levels, toxin overload from diet and the environment, and bacterial imbalances. When leaky gut occurs, small particles that are normally trapped inside the gut start to leak out into the bloodstream through tiny openings in the gut lining, which creates an autoimmune cascade and a series of negative symptoms.
The thyroid is the organ with the highest selenium content in the whole body. Selenium is necessary for the production of the T3 thyroid hormone and can reduce autoimmune affects. In patients with Hashimoto’s disease and in pregnant women with thyroid disturbances, selenium supplementation decreases anti-thyroid antibody levels and improves the structure of the thyroid gland.
Clara Schneider, MS, RD, RN, CDE, LDN, of Outer Banks Nutrition and author of numerous books, including The Everything Thyroid Diet Book, says, “The No. 1 priority is to get the thyroid disease under control. Clients need to have labs and medications addressed first. Weight changes are just not going to happen before all of that is under control.” She notes that Hashimoto’s typically occurs around menopause, which compounds the weight gain issue that many women experience during that time.
Hyperthyroidism, particularly Graves’ disease, is known to cause bone loss, which is compounded by the vitamin D deficiency commonly found in people with hyperthyroidism. This bone mass can be regained with treatment for hyperthyroidism, and experts suggest that adequate bone-building nutrients, such as vitamin D, are particularly important during and after treatment.13
Similar to processed foods, fast food chains also aren't required to use iodized salt in their foods. And even when they do, it might not boost the iodine content all that much, according to one 2010 commentary in the journal Endocrine Practice, which tested products from two fast food restaurants in the Boston area. The study authors concluded that drive-thru fare might be pretty low in iodine.
While you can’t control all the risks that come with hypothyroidism, experts recommend following a nutritious diet and loading up on a variety of nutrients. “Be mindful of what you’re eating, get in colors and organics and no artificial colors or flavors. It’s about balance, right?” says Marcelle Pick, a nurse practitioner of functional medicine in Falmouth, Maine, with a program for balancing hormones and reducing fatigue. Read up on the worst foods for hypothyroidism, and then check out these 15 Subtle Thyroid Disease Symptoms You’re Ignoring.
If that’s not enough to calm your concerns, some experts suggest that eating cruciferous vegetables may actually be beneficial if you have autoimmune hypothyroidism since the thiocyanates may slow the absorption of iodine in people getting too much, which is possible if you are eating a typical Western diet of fast foods, French fries, and other processed products, that contain iodized salt, and you are heavy-handed with the salt shaker.
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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