Heart problems - Hypothyroidism may be associated with increased risk of heart disease, mainly because high levels of low-density lipoprotein cholesterol (“bad” cholesterol) may occur in patients that have an underactive thyroid. Even mild or early stage hypothyroidism that does not present symptoms can cause an increase in total cholesterol levels and diminish the heart’s ability to pump blood.
Because it helps balance hormone levels, selenium can lower the risk for experiencing thyroid disorder during pregnancy (postpartum thyroiditis) and afterward. (15) 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 when given a placebo. (16)
To offer some perspective: up to 95% of the thyroid hypothyroidism in the US is caused not by an iodine deficiency, but occurs as the result of an autoimmune disease so avoiding cruciferous vegetables will do little to fix your underactive thyroid, and may deprive you of valuable healthy benefits such as dietary fiber, and anti-inflammatory, cancer-fighting antioxidants.5
High-fat fried foods, like mozzarella sticks, jalapeno poppers and um…fried chicken and French fries can contribute to inflammation in the body, says Blum. Inflammation from Hashimoto’s disease, also known as chronic lymphocytic thyroiditis, often leads to an underactive thyroid gland. Hypothyroidism primarily affects middle-aged women, according to the Mayo Clinic, but it can target anyone at any age.
l-Thyroxine monotherapy for athyreotic rats results in a high T4:T3 ratio at doses sufficient to normalize serum TSH levels (8). Yet, the brain, liver, and skeletal muscle tissues of these l-thyroxine–treated animals continue to exhibit markers of hypothyroidism (9), probably because of the inability of l-thyroxine monotherapy to restore tissue levels of T3 (8). This is probably a direct consequence of lower serum T3 levels and the relatively high T4 concentration in these tissues, which inactivates the type 2 iodothyronine deiodinase (D2). In the hypothalamus, loss of D2 is minimal in the presence of T4, which increases sensitivity to T4 levels and explains TSH normalization, despite relatively lower levels of serum T3. Only combination therapy with l-thyroxine plus l-triiodothyronine normalized all thyroid hormone–dependent measures (9), including serum and tissue T3 levels (8). Whether tissue-specific markers of hypothyroidism are restored with l-thyroxine monotherapy in humans remains to be determined, as does the ability of l-thyroxine plus l-triiodothyronine combination therapy to normalize the serum T4:T3 ratio without adverse events. The development of a novel drug delivery system for l-triiodothyronine would facilitate these studies (5).
Since iodine is found in soils and seawater, fish are another good source of this nutrient. In fact, researchers have long known that people who live in remote, mountainous regions with no access to the sea are at risk for goiters. "The most convincing evidence we have [for thyroid problems] is the absence of adequate nutrition," says Salvatore Caruana, MD, the director of the division of head and neck surgery in the department of otolaryngology-head and neck surgery at ColumbiaDoctors.
Since nutritional supplements are not regulated to the same stringent level as medications, you’ll also want to find a trusted source for any supplement you do take, so you can have some certainty of what you are getting, as you want to avoid any unnecessary or undesirable filler ingredients. For more on this read this EndocrineWeb article: Thyroid Supplements.
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.”
A meta-analysis of randomized, placebo-controlled studies has shown benefits of selenium on both thyroid antibody titers and mood in patients with Hashimoto’s, but this effect seems more pronounced in people with a selenium deficiency or insufficiency at the outset.15 Conversely, an excessive intake of selenium can cause gastrointestinal distress or even raise the risk of type 2 diabetes and cancer. So clients will benefit from having their selenium levels tested and incorporating healthful, selenium-rich foods in to their diets, such as Brazil nuts, tuna, crab, and lobster.15
This can lead to low T3 levels (58). In addition, elevated cortisol will cause thyroid hormone receptor insensitivity meaning that even if T3 levels are high enough, they may not be able to bind normally to receptor sites. And when this happens it doesn’t get into the cells. Cortisol will also increase the production of reverse T3 (rT3), which is inactive (11).
Hypothyroidism Medication: Conventional doctors almost always put their patients on either Synthroid® (a synthetic thyroid hormone pill that contains only T4; sometimes called Levothyroxine, Levothroid, Unithroid, and Tirosint) or Armour (Natural Desiccated Thyroid derived from the thyroid glands of pigs). Both are tablets that patients will have to take daily for the rest of their lives. In some cases, these medications might help, but there are all kinds of side effects and issues that arise. So I recommend two other medications over these two instead.
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• Selenium: The highest concentration of selenium is found in the thyroid gland, and it’s been shown to be a necessary component of enzymes integral to thyroid function.14 Selenium is an essential trace mineral and has been shown to have a profound effect on the immune system, cognitive function, fertility in both men and women, and mortality rate.
Soy? If you have hypothyroidism, yes. Eating too much soy causes problems only for those with hypothyroidism, which occurs when your thyroid gland does not make enough thyroid hormones, Dr. Nasr says. The main problem is that soy hinders absorption of the hormones such patients are taking. “Some studies show that if you eat a lot of soy, or drink a big glass of soy milk, within one hour of taking a thyroid hormone, it might affect absorption,” he says. “A lot of people depend on those hormones to achieve a steady state.
As for what’s causing your condition, this of course can vary. Many times it is caused by lifestyle factors, such as poor eating habits, lack of sleep, not handling stress well, etc. Other times it can be environmental toxins or an infection causing or contributing to such a condition. Genetics can also be a factor, although research shows that lifestyle and environmental factors play a much greater role in the development of these conditions. In fact, many people with a genetic marker for hypothyroidism or Hashimoto’s Thyroiditis can be helped a great deal by modifying some of their lifestyle factors, which is great news.
Although the implementation of sensitive TSH assays resulted in dose reduction, it also fueled the discovery of subclinical states of hypothyroidism (i.e., serum TSH <10 mIU/L and normal serum free T4); this state is 20 times more prevalent than overt hypothyroidism (64). Hence, many patients with vague symptoms, such as depressed mood and fatigue, are commonly screened and found to have subclinical hypothyroidism. In many cases, this finding prompts the conclusion that the subclinical hypothyroidism is the cause of the nonspecific symptoms, and thyroid hormone therapy is initiated. The patients in whom the cause–effect relationship was incorrect contribute to the increasing number of euthyroid but symptomatic patients (57). The marked increase in prescribing of thyroid hormone with decreasing TSH thresholds amplifies this problem (47).
Peripheral Neuropathy - Long-term untreated hypothyroidism can cause damage to the peripheral nerves - the nerves that transmit information from the brain and spinal cord to the rest of the body. Signs and symptoms of peripheral neuropathy might include numbness and tingling or pain in the affected area. Peripheral neuropathy can also cause weakness of the muscles and loss of muscle control.
4. Mitochondrial Dysfunction: The mitochondria are the energy producing organelles in each cell of the body. They are extremely key in the bodies ability to handle oxidative stress. Dysfunction in the mitochondria leads to increased free radical and oxidative stress which creates immune alterations. This is a classic sign in Hashimoto’s autoimmune pathophysiology (22).
Gluten – Many people with thyroid issues are also sensitive to gluten or have celiac disease, an autoimmune disease that results in an allergy to gluten. Gluten is found in all wheat, rye and barley products, so carefully check ingredient labels to avoid hidden gluten that is lurking in many packaged foods. Undiagnosed sensitivities to gluten can further raise inflammation, create nutrient deficiencies and worsen hormonal problems.
Hypothyroidism is generally treated with a single daily dose of levothyroxine, given as a tablet. An experienced physician can prescribe the correct form and dosage to return the thyroid balance to normal. Older patients who may have underlying heart disease are usually started at a low dose and gradually increased while younger healthy patients can be started on full replacement doses at once. Thyroid hormone acts very slowly in some parts of the body, so it may take several months after treatment for some features to improve.
I wish there were two different words to say what I want to say: one for “diet” as in when you want to lose weight and another “diet” as in a nourishing food change that will bring healing and joy. Oh well… But you know when I say “diet” I mean a protocol, a way of being, a way of living and eating that will free you from some or all of the fatigue, depression, anxiety, weight yo-yo’s, food frustrations, and infertility that have plagued you for some time now. I want to share with you what I know about the best healing diet for thyroid issues.
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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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