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Best Thyroid Health Supplements

Updated April 2022
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Best of the Best
Pure Encapsulations Thyroid Support Complex
Pure Encapsulations
Thyroid Support Complex
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Premium Ingredients
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Supplements for overall thyroid function that are free from many unwanted ingredients and hypoallergenic.


Made with a blend of vitamins, minerals, and herbal extracts. Used for thyroid metabolism and hormone performance. Helps neutralize free radicals. Free of many common allergens such as wheat and eggs, as well as artificial components. Comes in a container of 120 unflavored capsules.


According to a few reviews, these have a strong and unpleasant smell.

Best Bang for the Buck
Gaia Herbs Thyroid Support
Gaia Herbs
Thyroid Support
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High Quality
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High-quality, reputable herbal formula to support thyroid function.


Glowing results reported in weight loss and increase in energy. Some customers experienced blood-test proven improvement in their thyroid levels from use.


Only an herbal formula. Does not contain vitamins and minerals typical in competing thyroid support supplements.

Purely Holistic Natural Thyroid Support with Iodine
Purely Holistic
Natural Thyroid Support with Iodine
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Best Value
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Popular supplement with a comprehensive formula of essential minerals, herbs, amino acids, and vitamins. Includes iodine.


Reported increases in energy, brain function, libido, and weight loss. For some longtime thyroid sufferers, this was a game-changer. Double the capsule supply for the same price as competing brands.


Not gluten or soy-free. For some, no noticeable difference from taking this but took advantage of the 100% money-back guarantee.

Nature's Wellness Thyroid Support Complex with Iodine
Nature's Wellness
Thyroid Support Complex with Iodine
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Increases Energy
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Natural formula to boost energy, metabolism, and brain function. Contains key vitamins, herbs, and minerals — and iodine — for thyroid health.


Highly rated for increasing energy, without the jitters, and decreasing food cravings. Even lifted depression for some. Safe to take in combination with prescription thyroid medication.


Not ideal for people with food allergies. Some experienced heartburn due to cayenne content but received a full refund due to the guarantee.

1 Body Thyroid Support Supplement with Iodine
1 Body
Thyroid Support Supplement with Iodine
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Special Formula
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With a special blend of herbs, vitamins, and minerals, this formula will give your brain a boost.


This American-made formula is free of soy, gluten, and artificial fillers. Also vegan-friendly. Buyers report noticeable changes — such as decreased hair loss and greater energy — after a matter of weeks.


A few users have reported an allergic reaction. Check the label carefully for ingredients.

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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. About BestReviews  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.About BestReviews 

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

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Buying guide for best thyroid health supplements

The thyroid is a butterfly-shaped gland in your neck. It’s responsible for controlling your body’s metabolism, including regulating the heart and muscles and supporting cognitive function. Individuals with hypothyroidism don’t have enough thyroid hormones. These folks can benefit from a thyroid health supplement.

Before you look into purchasing thyroid health supplements, be sure to consult with a healthcare professional. Once they give the go-ahead, you want to consider a few key factors. You may want a hypoallergenic formula if you’re allergy prone. Also consider potential side effects, pill size, and additional nutritional benefits.

At BestReviews, we’re pleased to help you choose the best supplement for you. Keep reading our buying guide to learn more about the benefits of thyroid supplements and factors to keep top of mind while you shop. Fortunately, hypothyroidism is an easily treatable condition. Soon, you’ll be able to put an end to your fatigue, muscle weakness, and other symptoms of hypothyroidism.

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Hyperthyroidism is when the thyroid gland releases too much thyroid hormones. Hypothyroidism, or not enough hormones, is more common, so most thyroid health supplements cater to this deficit. Remember to check the labels to clarify which condition the supplements will alleviate.

Key considerations

The thyroid’s key function is regulating the body’s metabolism. The gland is fueled by iodine, which is derived from food to produce two hormones: triiodothyronine and thyroxine. 

The thyroid gland is controlled by the pituitary gland (located in the brain), which releases a thyroid-stimulating hormone. This gives the thyroid gland the go-ahead to release thyroid hormones throughout the body. Some main functions of the thyroid hormones include accelerating or decelerating the heartbeat, raising or lowering body temperature, and the speed at which food goes through the digestive tract.

Somewhere between 20 and 30 million Americans have a thyroid imbalance. A number of these individuals experience hypothyroidism, meaning the thyroid gland doesn’t create enough thyroid hormones. Most hypothyroidism is caused by inflammation of the thyroid gland, often an effect of autoimmune disorders or surgical removal of the thyroid. Some symptoms of hypothyroidism are hair loss, fatigue, weight gain, brain fog, and heavy or irregular periods. Thyroid health supplements can help regulate the thyroid’s function, alleviating hypothyroid symptoms

As you decide on the thyroid supplements that will work best for you, keep the following in mind.

Side effects

Because the thyroid is such a finely tuned gland, it’s imperative to not flood the body with the hormones. Signs of excessive thyroid hormones (hyperthyroidism) include increased heartbeat, hot flashes, fever, nervousness, sweating, and sleep problems. If any of these issues occur, stop the supplements immediately and consult a medical professional.


Thyroid supplements include a mix of vitamins that positively impact and support the thyroid hormones’ functions. Because the human body is an intricate machine, thyroid deficiencies can often be traced back to vitamin deficiencies.

B vitamins: A number of the B vitamins are important for thyroid function, so quite a few thyroid health supplements include them. In particular, a deficiency in B2 (riboflavin) directly correlates with low thyroid hormone levels. A B6 (pyridoxine) deficiency can result in lower levels of the thyroid-stimulating hormone that comes from the pituitary gland. Fish and red meat are rich in B12 (cobalamin), so a B12 deficiency is rather common in vegans and vegetarians. 

Iodine: This is another main component of thyroid health supplements. That’s because iodine is absolutely essential to thyroid hormone production. Since the body doesn’t produce iodine, it has to be sourced from foods, such as table salt in the United States. A lack of iodine consumption directly impacts the thyroid gland, causing thyroid enlargement 

Zinc: This mineral supports over 200 functions in the body, including the thyroid hormones. A zinc deficiency affects several processes in the body, including an underactive thyroid. Low zinc levels are also linked to lower levels of the thyroid-stimulating hormone from the pituitary gland. 

Selenium: The thyroid contains more selenium than any other organ in the body. Selenium is a protective mineral, shielding the thyroid from oxidation damage. Low selenium levels have been linked to thyroid conditions such as Hashimoto’s thyroiditis (a kind of hypothyroidism). 

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Did you know?
Hypothyroidism impacts women more than men. It’s estimated that one in eight women will experience hypothyroidism in their lifetime.



You may be among the millions of Americans with a dairy, soy, or gluten allergy. Some of these ingredients, like soy, are common in vitamins and health supplements. You can avoid allergy flare-ups by reading the ingredient labels carefully. Even if the thyroid health supplements don’t include allergens that affect you, they could be manufactured in a facility that processes those items. Double-check the ingredients to be on the safe side. 

Organic vs. synthetic

Organic vitamins are derived from plant-based materials, meaning all the nutrients in the vitamin are sourced naturally. The farms that supply the ingredients for the supplement may use organic soil, harvesting the plants at peak timing. 

Synthetic vitamins, as the name implies, are created in a lab setting. The majority of popular health supplements are created this way. Synthetic vitamins do a pretty decent job of mimicking the vitamins found naturally in food. However, it’s still unclear whether or not the body has more trouble absorbing synthetic nutrients.


You don’t take thyroid health supplements for their taste, but a particularly unpleasant flavor can dissuade you from taking the supplements consistently. The majority of thyroid health supplements are packaged in pill form. These pills range in taste from flavorless to chalky. Still, you can find tips and tricks that will make any pill easier to swallow, such as taking it with a soft food like applesauce.

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Expert Tip
Thyroid supplement doses are based on your weight. A general guideline is 0.8 micrograms of thyroid hormone per pound, but this rate can vary based on other individual factors. All the more reason to consult your doctor before taking thyroid health supplements.

Thyroid health supplement prices

As with any product you put in your body, it’s best to spend more for higher quality rather than save on cheaper brands. For a thyroid health supplement of decent quality, you can expect to spend between $15 and $35, or about $0.17 to $0.35 per capsule. Variances in cost depend on the quantity, manufacturer, and ingredients. 

Inexpensive: You’d be hard-pressed to find any thyroid health supplements for under $15 to $20 per bottle. Even at this price point, the options are limited. The majority of pills in this range include no more than 60 capsules, which works out to a month’s supply of two capsules a day. 

Mid-range: You have more options in the $20 to $30 range, including a greater quantity of pills, such as 80 or 120, and an allergen-free guarantee. Pills in this range are also more likely to be sourced from organic ingredients. 

Expensive: For $30 and above, a number of thyroid health supplements are medical grade or sold in bulk (such as two bottles or more). They may also be manufactured in smaller quantities (hence the price hike) or include additional organic herbs.

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Did you know?
Thyroid cells are the only ones in the body that absorb iodine. When iodine moves through the bloodstream, the cells in the thyroid oxidize it to create thyroid hormones.


  • Avoid certain ingredients and foods if you have hypothyroidism. If you have hypothyroidism, it’s particularly important to avoid supplements with gluten and soy because both may be linked to low thyroid hormone levels. You should also avoid excessively processed foods like cake and hot dogs. 

  • Support your thyroid health. To foster healthy thyroid function, limit your intake of sugary foods and caffeine.

  • Eat organic. Hormones and antibiotics may trigger autoimmune responses that exacerbate thyroid problems. When possible, consume an organic, hormone-free diet.

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You can try putting large pills in applesauce or pudding to make them easier to swallow. Also, with your doctor’s permission, you can crush the pills and put them in food.


Q. Are there thyroid health supplements targeted toward men or women?
A. Since women experience more thyroid problems than men, some supplements are marketed with women specifically in mind. But for the most part, over-the-counter thyroid supplements are gender neutral.

Q. What drugs or vitamins should I avoid taking with thyroid health supplements?
A. Avoid taking thyroid health supplements with calcium or iron, which affect the body’s ability to absorb the vitamins. 

Q. Can I take thyroid health supplements with alcohol?
A. We don’t recommend it. Over time, consistent alcohol use can lower the thyroid gland’s ability to function properly.