Could kale, that superstar among superfoods, actually not be quite so awesome? Kale is a mild goitrogen -- in rare cases it prevents the thyroid from getting enough iodine. But kale shouldn't be a problem for you unless you get very little iodine in your diet and you’re eating large amounts of kale. This is also the case for cabbage, broccoli, cauliflower, and Brussels sprouts.
To document that this was a result of trends toward lower doses, an unblinded study tracked well-being according to various doses and found that the highest well-being was achieved at supraoptimal doses, resulting in a suppressed TSH (65). However, a blinded trial did not reproduce this finding (66). In a call to the public, a 1997 British Thyroid Foundation newsletter asked readers to recount personal history of residual hypothyroid symptoms. More than 200 patients responded, 54 of whom specifically mentioned that they did not feel well despite normal serum markers of thyroid function (67, 68). Because of this surge in symptomatic patients, some clinicians advocated titrating dose by symptoms rather than serum TSH, reminiscent of the period before the 1970s (69).
The early symptoms of hypothyroidism are very subtle and can often be confused with symptoms of other health conditions. If you have a mild case of hypothyroidism you may not even exhibit any symptoms or signs of the condition, making it almost impossible to diagnose until the condition worsens over time. As the metabolic functioning of the body slows down, various symptoms start becoming more evident and a diagnosis is possible.
While there is no specific diet regime that hypothyroid patients are supposed to follow, they should make sure that they eat a well-balanced diet full of all the nutrients and vitamins that are required by the body. Doctors suggest that eating too much of any food is going to be harmful to thyroid patients. Hence, a generous mix of nutrient-rich fruits and vegetables are going to be helpful for people suffering from hypothyroidism.
T4 circulates through to the liver where 60% of it is converted into T3 through the glucoronination and sulfation pathways. If the liver is sluggish it will cause a problem in T4-T3 conversion (6). Another 20% is converted into reverse T3 which is permanentely inactive. The final 20% is converted into T3 sulfate and T3 acetic acid which can then be further metabolized by healthy gut bacteria to produce more active T3 (6).
Goitrogens are naturally occurring substances in certain foods that interfere with the production of thyroid hormones (the hormones that people with hypothyroidism lack). They include some of the most commonly consumed foods of the health-conscious community: broccoli, cauliflower, kale, spinach, radishes, soybeans, peanuts, pine nuts, peaches and millet. The good news is that many health professionals believe that cooking may inactivate goitrogens.
People diagnosed with hypothyroidism are more susceptible to problems with infertility, miscarriages, and having babies born with birth defects. As hypothyroidism progresses it can even lead heart failure, fluid collection in the lungs, and enlarged heart and even a life-threatening condition called myxedema coma. This condition requires immediate medical attention and hospitalization. If you suffer from hypothyroidism and have any of the following symptoms, contact your doctor at the earliest:
Like many progressive thyroid practitioners, such as Dr K and Dr Wentz, I believe there is no need to cut these wonderful vegetables 100% out of our diets. The reason is: all crucifers are high in DIM (di-indolyl-methane) which is a substance that supports the liver detoxification pathways. This detoxification process helps us eliminate metabolized (or “used up”) hormones like estrogen as well as thyroid hormones to make space for new ones.
If hypothyroidism is left untreated, symptoms of myxedema can appear. These include very dry skin, and swelling around the lips and nose called non-pitting (firm) edema. More severe symptoms can be life-threatening and include low blood pressure, decreased body temperature, shallow respirations, unresponsiveness and even coma. Fortunately, advanced hypothyroidism such as this is quite rare.
“We summarized that adequate iodine nutrition of 150 mcg a day is essential for normal thyroid function but that an excessive intake—be it from a variety of sources (eg, fortified salt, supplements, seaweed, seafood)—can have the reverse effect: too much iodine can cause hypothyroidism and hyperthyroidism and too little iodine low may lead to hypothyroidism,” Dr. Leung says.
Most physicians diagnose hypothyroidism by simple blood tests that measure the level of TSH (thyroid stimulating hormone), which is made by the pituitary gland in response to thyroid hormone and the body’s needs, and indicates thyroid status. As levels of thyroid hormones fall, the pituitary releases TSH to stimulate the thyroid to produce more hormone. Clinicians may also measure circulating levels of T-3 and T-4, which are the thyroid hormones themselves. Low levels of T-4 and high levels of TSH reveal an underactive thyroid. Other variants of hypothyroidism can exist. Patients can have no symptoms and normal serum thyroid hormone levels, but elevated TSH. Others can have symptoms, but normal TSH and T-4 levels. Patients with either of these variants may benefit from supplementation. In addition, someone with a temporary illness might have a completely normal thyroid but high TSH, a condition called “sick euthyroid” which usually resolves without any intervention.
If you do choose to eat gluten, be sure to choose whole-grains varieties of bread, pasta, and rice, which are high in fiber and other nutrients and can help improve bowel irregularity, a common symptom of hypothyroidism. Also be sure to take your hypothyroidism medication several hours before or after eating high-fiber foods, to prevent them from interfering with the absorption of your synthetic thyroid hormone.
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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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