Best Foods for Thyroid Health + Superfood Smoothie Recipe

QUICK SUMMARY

What are the best foods for thyroid health? Some of the best foods for thyroid health include Brazil nuts for selenium, pumpkin seeds for zinc, coconut yogurt for gut support, pears and oranges for fiber and antioxidants, cilantro, and small amounts of kelp for iodine when appropriate. Your thyroid needs selenium, zinc, iodine, vitamin D, protein, and healthy fats to make and regulate its hormones, but more is not always better, especially with iodine. Our superfood smoothie below blends many of these foods into a quick breakfast or snack.

Supporting your thyroid with food does not have to be overwhelming.

Start with one simple change: add Brazil nuts, swap vegetable oil for olive oil, use glass instead of plastic, or make this superfood smoothie. Adding cilantro to guacamole and choosing whole fruit over juice count, too.

Little by little, you can create a lifestyle that nourishes your thyroid instead of working against it.

Food is not just fuel. It is information for your cells, your hormones, your gut, your immune system, and your energy. Choose wisely, and let your kitchen become one of your first places of healing.

Why Food Matters for Thyroid Health

Making dietary changes to include the best foods for thyroid health may seem intimidating, but it is entirely doable.

Start small: add one thyroid-supportive recipe to your menu plan, swap one inflammatory oil, replace one sugary drink, or add one mineral-rich snack. These little steps add up.

Healthcare professionals can be great allies, especially when you are dealing with hypothyroidism, hyperthyroidism, Hashimoto’s, Graves’ disease, thyroid nodules, medication, or abnormal labs. But you should also do everything you can to maximize your healing at home, and that means using food as a daily tool.

Hippocrates said, “Let food be thy medicine, and let medicine be thy food.” Those wise words are still relevant today.

Your thyroid needs specific nutrients to function well. Selenium helps protect thyroid tissue and supports thyroid hormone metabolism. Zinc is involved in thyroid hormone production and conversion. Iodine is required to make thyroid hormones. Vitamin D supports immune regulation, which matters deeply in autoimmune thyroid disease. Protein, healthy fats, fiber, and antioxidant-rich plants all help support the bigger picture.

Thyroid healing is not about one “magic” food. It is about building a lifestyle that nourishes the thyroid, calms inflammation, supports the gut, reduces toxic burden, and gives your body what it needs to do the work God designed it to do.

The Best Foods for Thyroid Health

It may surprise you that some of the best foods for thyroid health are commonly found in kitchens worldwide. You probably already have at least one of them in your cupboards.

You do not have to break the bank to experience better health.

Whether you struggle with hypothyroid or hyperthyroid symptoms, here are some of our favorite thyroid-supportive foods.

1. Brazil Nuts for Selenium

Brazil nuts are one of the richest food sources of selenium.

That matters because the thyroid contains more selenium per gram of tissue than any other organ in the body. Selenium is needed for antioxidant protection inside the thyroid and for the metabolism of thyroid hormones. (1)

A 2024 systematic review and meta-analysis also found that selenium supplementation in people with Hashimoto’s thyroiditis lowered TSH, thyroid peroxidase antibodies, and oxidative stress markers in certain groups. (2)

Food first is a beautiful approach here. Just 1 to 2 Brazil nuts can provide a meaningful amount of selenium, depending on the soil where they were grown.

Application: Snack on Brazil nuts plain, chop them over smoothie bowls, or blend them into homemade nut butter. Do not overdo it. Selenium is essential, but too much can be harmful.

2. Cilantro for Detox Support

Cilantro is a potent medicinal herb in any form. While the essential oil benefits are excellent, simply eating fresh cilantro is a gentle daily way to support detox pathways.

Coriander has been studied in animals for antioxidant activity and protection against heavy metal damage. In a 2023 rat study, polysaccharides from coriander seeds cut cadmium-induced oxidative damage and protected the liver. (3) This matters because environmental toxicants and heavy metals have been linked with altered thyroid function and endocrine disruption. (4)

Do you dislike the taste of cilantro? You can easily hide it in creamy recipes.

Our favorite way to enjoy cilantro is in my Homemade Guacamole.

Application: Add cilantro to smoothies, guacamole, salsa, salads, soups, tacos, and detox-friendly meals.

3. Pears and Oranges for Fiber and Antioxidants

Pears are rich in fiber, including pectin, a soluble fiber that can support elimination and gut health.

Oranges are a refreshing thyroid-supportive food because they provide vitamin C, flavonoids, hydration, and natural sweetness. Whole oranges, or freshly squeezed juice in moderation, are a much better choice than the concentrated juice products you often find in the store.

Application: Add pears or oranges to smoothies, salads, yogurt bowls, or snack plates. Choose whole fruit most often.

4. Pumpkin Seeds for Zinc

Pumpkin seeds contain zinc, a mineral with a close relationship to thyroid function.

Zinc is involved in thyroid hormone metabolism, and thyroid hormones are also involved in zinc absorption and regulation. A 2022 review of trace elements and the thyroid lists zinc among the minerals the gland depends on to make and process its hormones, with both deficiency and excess linked to thyroid problems. (5)

Pumpkin seeds are also rich in magnesium, healthy fats, and plant protein.

Application: Add pumpkin seeds to smoothies, trail mix, salads, granola, dairy-free yogurt, or homemade seed butter.

5. Coconut Yogurt for Vitamin D and Gut Support

Yogurt can provide beneficial microbes and, when fortified or paired with vitamin D-rich foods, may support immune health. We prefer coconut milk yogurt because it helps us support gut health without the side effects that dairy can bring for some people.

Many studies have linked low vitamin D levels with autoimmune thyroid diseases, including Hashimoto’s and Graves’ disease. A 2023 review describes vitamin D’s role in immune regulation and in these autoimmune thyroid conditions. (6)

Gut health and vitamin D status are worth paying attention to when you are supporting thyroid wellness.

Application: Choose unsweetened coconut yogurt with live cultures when possible, and add berries, seeds, cinnamon, or a small amount of raw honey if needed.

6. Kelp for Iodine

Kelp is an iodine-rich sea vegetable, and iodine is required to synthesize thyroid hormones. (7)

Both iodine deficiency and excess iodine intake can contribute to thyroid disorders. Seaweed can contain highly variable iodine levels, and too much can be a problem, especially for people with Hashimoto’s or other autoimmune thyroid conditions. (8)

Kelp can be an excellent thyroid-supportive food when iodine is needed, so if you are not used to it, ease in slowly. One simple approach is replacing a small portion of your salt with powdered kelp, but only if iodine is appropriate for your thyroid situation.

Application: Use tiny culinary amounts of kelp powder, and ask your practitioner before using kelp regularly if you have thyroid disease, take thyroid medication, are pregnant, or have autoimmune thyroid antibodies.

Hidden Dangers to Your Thyroid

What is hiding in your kitchen cupboards?

The key to getting your thyroid back on track might include a simple swap or two. Here are a few things to kick out of your home or reduce as much as possible.

1. Soy Products

Soy can be complicated.

A review of levothyroxine interactions found that soy foods and soy supplements may interfere with thyroid medication absorption in some cases, and people taking levothyroxine should be consistent and mindful about timing. (9)

This does not mean everyone must avoid all soy forever. But if you have thyroid imbalance, especially hypothyroidism or medication management issues, soy deserves attention.

Instead of making soy a daily staple, use fermented, non-GMO products like tamari occasionally if tolerated.

Application: If you take thyroid medication, ask your pharmacist how far to separate it from soy, fiber supplements, minerals, coffee, and other foods that may affect absorption.

2. Factory-Farmed Meat

Factory-farmed meat often comes from animals raised on lower-quality feed and crowded systems that may not support optimal health.

A better choice is local, organic, grass-fed meat from animals raised humanely and provided with nutritious food.

You are what you eat – and what your food ate.

3. Processed Fruit Juice

Fruit juice is often disguised as a health food, but many bottled juices are almost as sugary as soda. They may contain hidden sugars, concentrates, corn syrup, flavorings, and preservatives.

After processing and pasteurization, many juices are not nearly as nutrient-rich as whole fruit.

You can still enjoy organic juice in moderation, as we do in our Warmed Holiday Punch, and fresh-squeezed juice can be a great option. But whole fruit is usually the better daily choice.

4. PUFA-Rich Vegetable Oils

PUFAs, also known as polyunsaturated fatty acids, are found in many common vegetable oils like canola, corn, soybean, cottonseed, and safflower oil.

These oils are often highly processed and show up in packaged foods, restaurant meals, dressings, crackers, chips, and fried foods. This minor dietary change is one swap that is easy to make, and you will not miss the old oils.

We recommend using coconut oil, extra-virgin olive oil, or avocado oil.

5. BPA and Plastic Food Storage

BPA and plastic that touches your food can contribute to endocrine-disrupting chemical exposure.

No matter how safe plastics claim to be, it is wise to rely on the abundance of available glass and stainless food storage options whenever possible.

Application: Start by replacing plastic containers used for hot foods, acidic foods, oils, and leftovers. Heat and fat can increase chemical migration.

6. Non-Stick Cookware

Non-stick-coated cookware can expose your family to chemicals you do not want in your kitchen, especially when scratched, overheated, or poorly made.

We recommend using stainless steel cookware or ceramic cookware.

Bonus: It lasts longer!

Superfood Smoothie Recipe

This superfood smoothie contains many of the thyroid-supportive foods we just discussed and makes a quick, easy breakfast or snack.

We recommend using organic or locally grown produce whenever possible. This beverage includes unique flavors that mesh beautifully, and essential oils are the icing on top.

Thyroid Boosting Smoothie (Vegan)

Total Time 10 minutes minutes

Author Mama Z

Print Recipe Pin Recipe

Quantity

2x4x6x

Ingredients

• 3 raw organic Brazil nuts
• 5 stems organic cilantro (wash and pluck the leaves; discard stems)
• 1 drop cilantro essential oil
• 1 drop orange essential oil
• 1 organic pear, sliced with skin on, seeds removed
• 1 organic orange OR tangerine, peeled
• 2 tablespoons raw organic pumpkin seeds OR raw organic sunflower seeds
• ¼ cup unsweetened vanilla coconut OR almond milk yogurt alternative
• ⅛ teaspoon organic powdered kelp (optional)
• Purified OR distilled water OR ice

Supplies

• Blender

Instructions

 

• Place the Brazil nuts, cilantro, essential oils, pear, orange, raw pumpkin seeds, yogurt alternative, and powdered kelp (if using) in a blender.  Blend thoroughly.  If needed, add purified or distilled water until the smoothie reaches the desired consistency.

Notes

Whenever possible, we recommend using organic, non-GMO ingredients.

Step One: Blend All Ingredients

Place the Brazil nuts, cilantro, pear, orange, essential oils, pumpkin seeds, yogurt, and powdered kelp, if using, in a blender.

Blend until smooth, adding distilled or purified water if needed to reach your desired consistency.

I recommend using a glass-bodied blender. If you use a Vitamix or another plastic blender, you may find that essential oils can stain the plastic. You can help avoid this by adding essential oil in the last step or adding it to each cup individually.

Safety note: Only use essential oils in food if they are pure, properly labeled for culinary use, and dispersed well into the recipe. Use tiny amounts. Do not add essential oils directly to water or consume them straight from the bottle.

For many people, thyroid imbalance can be improved by eliminating toxins that disrupt the endocrine system. The body sends signals to warn us when something is wrong. Simple steps like removing artificial fragrances and purifying your water can create a world of difference.

Thyroid Food FAQs

What foods are best for thyroid health?

Some of the best foods for thyroid health include Brazil nuts, pumpkin seeds, seafood or sea vegetables in appropriate amounts, coconut yogurt, cilantro, pears, oranges, leafy greens, clean protein, and healthy fats. These foods provide selenium, zinc, iodine, vitamin D support, antioxidants, fiber, and minerals.

Are Brazil nuts good for the thyroid?

Yes. Brazil nuts are rich in selenium, and the thyroid has the highest selenium concentration per gram of tissue in the body. Selenium supports thyroid hormone metabolism and antioxidant protection inside the thyroid. (1)

How many Brazil nuts should I eat for thyroid support?

Most people only need 1 to 2 Brazil nuts per day because selenium content can be very high and varies by source. Do not eat large handfuls daily, because too much selenium can be harmful.

Is kelp good for thyroid health?

Kelp can support thyroid health when iodine is needed because iodine is required to make thyroid hormones. But kelp can be very high in iodine, and too much iodine can trigger thyroid problems, especially in sensitive people or those with autoimmune thyroid disease. (7, 8)

Should people with Hashimoto’s avoid iodine?

Not everyone with Hashimoto’s needs to avoid iodine completely, but high-dose iodine or frequent kelp use can worsen symptoms in some people. Work with your practitioner and test iodine status before supplementing.

Is soy bad for thyroid health?

Soy may interfere with levothyroxine absorption in some cases, especially when eaten too close to thyroid medication. Soy does not affect everyone the same way, but thyroid patients should be mindful of timing and tolerance. (9)

What foods should I avoid for thyroid support?

Consider reducing refined sugar, ultra-processed foods, factory-farmed meats, processed fruit juice, canola and soybean oils, artificial fragrance exposure, BPA plastics, and non-stick cookware chemicals. Food quality and toxic burden both matter.

Can a smoothie help thyroid health?

Yes, a thyroid-supportive smoothie can be an easy way to add selenium, zinc, fiber, antioxidants, vitamin-rich fruit, herbs, and healthy fats to your day. It will not replace medication or treatment, but it can support your overall nutrition.

Can essential oils be used in smoothies?

Yes, but only if they are pure, properly labeled for culinary use, and used in tiny amounts. They must be dispersed into the smoothie ingredients. Never drink essential oils in plain water or use oils internally without understanding safety.

Can diet reverse thyroid disease?

Diet can make a powerful difference in thyroid symptoms, inflammation, gut health, autoimmunity, nutrient status, and energy. Some people also need medication or medical treatment, and a thyroid-supportive lifestyle works right alongside it.

Keep reading: Magnesium Deficiency: Signs, Causes, Foods & Supplements · Is Tap Water Safe to Drink? · Essential Oils for Gut Health: 7 Oils for Digestion, Bloating & IBS Support