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Which Thyroid Supplements Are Safe: Tips & Recommendations

thyroid supplements to support thyroid health

According to the American Thyroid Association, over 1 in 10 Americans will develop a thyroid condition in their lifetime. When people are diagnosed with thyroid, they seek out methods to improve their overall health and well-being. Many people struggling with symptoms of an underactive thyroid, such as fatigue, low energy, thinning hair, weight gain, and skin changes, prefer to take thyroid medications like Synthroid 137 mcg tablets. However, one of the obvious starting points to reduce symptoms and enhance our response to the prescribed medication is looking at the dietary and food supplements we consume. Optimizing the intake of key nutrients aids in correcting deficiencies and improving the production and function of thyroid hormones.

Essential Nutrients and Supplements for Thyroid Conditions

Compared to prescription medications, using natural supplements to nourish thyroid disorders helps resolve deeper issues and resume normal thyroid function. Medication imparts thyroid replacement therapy, but it does not correct the underlying issues. Whereas the supplements, in addition to lifestyle changes, make symptoms disappear and drive thyroid dysfunction. Here’s more about each supplement and how it helps support thyroid health. Let’s delve into the details:


Iodine is critical for thyroid function and supports thyroid hormone production. Its deficiency can lead to thyroid disorders. Individuals with healthy thyroid function should have adequate levels of iodine. The recommended intake for people over 19 years of age is 150 mcg. However, teenagers and pregnant women may require a slightly higher dose of 220 mcg. Breastfeeding women require 290 mcg of iodine. However, in people suffering from hypothyroidism or hyperthyroidism, taking iodine supplements is not only unnecessary but also potentially harmful. They should prefer natural sources of iodine, which may include: 

  • Seaweed 
  • Greek yogurt
  • Cod 
  • Eggs 


This mineral is crucial for thyroid hormone production and helps safeguard the thyroid from oxidative stress. However, according to the National Institutes of Health, insufficient evidence suggests whether it can reduce an individual’s risk of thyroid disorders. Supplements containing selenium can be beneficial for people with Hashimoto’s disease. However, taking high amounts of selenium can be harmful, and it may lead to hyperglycemia, cancer, or atherosclerosis. Dietary sources of the mineral include:

  • Seafood 
  • Eggs 
  • Meat 
  • Bread
  • Dairy products
  • Cereals 


The body requires zinc for thyroid hormone production and in the synthesis and metabolism of T3, T4, and TSH. However, taking too much zinc for long periods can cause digestive problems or may lead to lowered immunity or low copper levels in the body. Dietary sources of zinc may include: 

  • Red meat
  • Oysters 
  • Poultry 
  • Fortified breakfast cereals
  • Seafood, such as lobsters and crabs


Insufficiency of iron can cause hypothyroidism. It is necessary to convert T4 into the active form T3. However, too much iron intake can decrease zinc absorption and cause toxicity. Dietary supplements of iron may include: 

  • Peas 
  • Lean meat
  • Poultry 
  • Seafood 
  • Fortified breakfast cereals
  • Lentils 
  • White beans
  • Spinach 
  • Kidney beans

Other nutrients, such as calcium, vitamins, minerals, and probiotics, are also required to maintain optimal thyroid function. Being deficient in one or more of these nutrients can negatively impact the thyroid and increase the risk of thyroid dysfunction. For most people, following a nutrient-rich diet with whole foods is sufficient to maintain optimal thyroid function. 

Vitamin D

Vitamin D is a commonly used dietary supplement that regulates the production of calcium and phosphate. Some studies have indicated a possible link between low levels of vitamin D in thyroid cancer and thyroid diseases such as Hashimoto’s thyroiditis and Graves’ disease. However, more research is needed to establish conformity. It is also important to note that too much vitamin D intake can be dangerous. This typically happens when a person takes supplements when they are not required. This can lead to kidney failure. Individuals can increase their vitamin D levels by incorporating the following food items in their diet: 

  • Fish liver oils
  • Fatty fish
  • Fortified foods, such as orange juice, snack bars, cereal, and milk 

Vitamin A

Vitamin A inhibits TSH levels and helps regulate thyroid hormone metabolism. It helps in preventing enlargement of the thyroid gland. Retinoids, a type of vitamin A, can adversely affect iodine metabolism. People can intake Dietary sources of vitamin A, such as:

  • Beef liver
  • Green leafy vegetables
  • Salmon 
  • Dairy products

Benefits of Thyroid Supplements

  • Reduce inflammation
  • Improves hair, nail, and skin health
  • Increase energy levels
  • Support metabolism
  • Regulate body temperature
  • Improve cognitive function
  • Improve mood

General Recommendations for Taking Thyroid Supplements

If you exceed the recommended dosage intake, thinking it will benefit you, it will do more harm than good. Do not take large doses of thyroid supplements unless directed by a licensed healthcare professional. Not all thyroid-specific supplements are suitable for everyone. Some may have negative side effects or harm the thyroid. Always discuss with a licensed healthcare professional before planning to take any new supplements, especially if you have a thyroid condition.

Certain populations may benefit from supplementing their diet with vitamins, minerals, and other nutrients. These include individuals with specific health conditions or deficiencies like Hashimoto’s disease, Graves’ disease, thyroid cancer, or other conditions that affect the thyroid gland. Lastly, to ensure the authenticity of supplements and medications, it’s essential to buy drugs from Canada online from reputable and reliable sources such as Polar Bear Meds. 


In conclusion, while dietary supplements can be beneficial in supporting thyroid health and addressing deficiencies, it is important to approach their use cautiously and under the guidance of a healthcare professional. Supplements like iodine, selenium, zinc, iron, vitamin D, and vitamin A play essential roles in thyroid function, but excessive intake can have adverse effects. Obtaining these nutrients primarily from a balanced diet rich in whole foods is important. 

Supplements should be used judiciously and in appropriate doses to avoid potential harm. Individuals with thyroid conditions should work closely with their healthcare providers to determine the right supplementation plan tailored to their needs and health status. Overall, a comprehensive approach that includes proper nutrition, lifestyle modifications, and medical management is key to managing thyroid disorders effectively.

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