15 Foods for Hypothyroidism

2. Sardines (Iodine-Rich)

Sardines are a natural source of iodine, a mineral the thyroid needs to produce hormones. Without sufficient iodine, thyroid hormone levels can drop, which may worsen symptoms associated with hypothyroidism. A small serving of sardines can help adults meet the recommended daily intake of about 150 micrograms.

In addition to iodine, sardines provide selenium, which helps activate thyroid hormones, and vitamin D, supporting overall nutrient balance. They also supply protein to maintain muscle strength and omega-3 fats to support heart health, especially important for people with hypothyroidism, who may have an increased cardiovascular risk.

Together, these nutrients make sardines a practical choice for supporting thyroid function. Canned sardines are widely available and easy to prepare. They can be added to salads, whole-grain toast, or pasta. Choosing options packed in water or olive oil helps control added fats and calories while maintaining nutrient benefits.

3. Fennel (Iodine-Rich)

Fennel is a crisp vegetable with a mild, sweet taste that contains small amounts of iodine, a mineral the thyroid gland needs to produce hormones. These hormones help regulate how the body uses energy. Adults require about 140 micrograms of iodine per day, which many obtain from dairy, eggs, seafood, or iodized salt.

Fennel can add small amounts of iodine to your diet, especially when grown in iodine-rich soil. Enough iodine helps support normal thyroid hormone production, while too little over time may contribute to low thyroid hormone levels, fatigue, and weight gain.

Fennel also provides dietary fiber, which supports healthy digestion—a process that can slow in people with hypothyroidism—and small amounts of vitamin C. Its low-calorie content makes it easy to incorporate into meals without significantly increasing energy intake. Fennel can be eaten raw in salads, roasted as a side dish, or sliced into soups and stir-fries.

4. Jerusalem Artichokes (Iodine-Rich)

Jerusalem artichoke are root vegetables that contain small amounts of iodine. This mineral helps the thyroid produce hormones that regulate energy use, body temperature, and heart rate. Adults need about 140 micrograms of iodine each day, and foods such as dairy, eggs, seafood, iodized salt, and iodine-rich vegetables can help meet that need.

The iodine content in Jerusalem artichokes depends on the soil where they are grown. Plants from iodine-rich soil usually contain higher levels. Adequate iodine supports normal thyroid hormone production, while low intake over time may contribute to fatigue, weight changes, and slower metabolism. Jerusalem artichokes also provide dietary fiber, especially inulin. This fiber supports gut health and helps stabilize blood sugar.

Stable blood sugar may help people with hypothyroidism manage weight changes linked to low thyroid function. These vegetables have a mild, slightly sweet taste and can be roasted, steamed, or sliced thin for salads. Cooking softens their texture and makes them easier to digest. Eating them as part of a varied diet can support iodine intake without depending on high-dose supplements, which may affect thyroid function if overused.

5. Cranberries (Iodine-Rich)

Cranberry provides a small but helpful amount of iodine. This mineral helps the thyroid produce hormones that regulate metabolism, body temperature, and energy use. Without enough iodine, the thyroid can enlarge and slow down. Fresh cranberries contain natural iodine from the soil where they grow, and one cup of raw cranberries can modestly contribute to daily iodine intake when eaten as part of a balanced diet.

Cranberries also supply vitamin C, which supports the immune system. They provide dietary fiber that promotes digestion, helps stabilize blood sugar, and may relieve constipation. These are common concerns for people with hypothyroidism. Their natural tart flavor also makes them easy to combine with other nutrient-rich foods such as yogurt, oats, or salads without adding large amounts of sugar.

For best results, choose fresh or frozen cranberries. Avoid dried cranberries or sweetened juice because extra sugar may add to weight gain. If you take thyroid hormone medicine, eat cranberries and other high-fiber foods at a different time, since fiber can reduce how well the medicine is absorbed.

6. Basil (Iodine-Rich)

Basil provides small amounts of iodine, a mineral the thyroid needs to produce hormones that regulate energy use. Adults require about 140 micrograms of iodine per day, which must be obtained through food because the body cannot produce it. Without adequate iodine, the thyroid cannot function properly.

Although basil contains less iodine than seafood or dairy, it can contribute to steady iodine intake when used regularly in cooking. The iodine content varies depending on the soil in which it is grown, with plants from iodine-rich soil providing higher levels.

People with hypothyroidism benefit from consistent iodine intake rather than large doses at once, as excessive iodine over time can also affect thyroid function. Basil can be used fresh, dried, or in sauces and added to soups, salads, eggs, and grain dishes. It boosts flavor naturally without adding salt or sugar while supporting a balanced diet and contributing to daily iodine intake.

7. Seaweed (Iodine-Rich)

Seaweed is one of the richest natural sources of iodine. This mineral helps the thyroid gland produce hormones that regulate energy use, heart rate, and body temperature. Small amounts of iodine help maintain normal thyroid function, especially for people who do not get enough from foods such as dairy, seafood, or iodized salt.

Common types of seaweed include kelp, nori, wakame, and dulse, which appear in sushi, snacks, and some soups. Even a small serving can provide a substantial amount of iodine. Seaweed also provides trace minerals such as iron and magnesium, which support general metabolic function and overall nutritional balance. Its naturally low calorie content makes it easy to include in meals without adding excess energy intake.

Because iodine levels vary widely between seaweed types, portion size matters more than frequency when adding it to meals. However, excessive iodine intake, such as large portions of kelp or high-dose supplements, can disrupt hormone balance, especially in people with autoimmune thyroid disease.

8. Cinnamon (Metabolism-Boosting)

Cinnamon is a flavorful spice that contains plant compounds supporting metabolic health, including modest effects on blood sugar regulation. Stable blood sugar helps maintain steady energy throughout the day, which is particularly useful for people with hypothyroidism who often experience slower metabolism and weight gain.

Cinnamon also provides antioxidants, which protect cells from oxidative damage and support overall thyroid health. Its strong flavor means even small amounts can have a noticeable effect in meals without adding many calories. It blends easily with both warm and cold foods, making regular use simple across different meals.

Some people use cinnamon to reduce added sweeteners in foods and drinks. Its aroma can also make simple foods feel more satisfying, which may support portion control during meals. A small pinch is often enough to flavor one serving. It can be sprinkled on oatmeal, yogurt, or fruit, mixed into smoothies, or added during cooking. Using cinnamon in whole foods adds flavor and supports balanced eating habits.

9. Ginger (Metabolism-Boosting)

Ginger is a root commonly used as a spice and natural remedy. It contains plant compounds that may support metabolism, the process by which the body converts food into energy. Stable metabolism helps maintain steady energy, which is particularly useful for people with hypothyroidism who often experience slower metabolism, weight gain, and fatigue.

Ginger also has anti-inflammatory properties, which may reduce mild inflammation and help the body function more smoothly. It may also aid digestion by moving food through the stomach and easing mild nausea or bloating, which can improve comfort after meals. A warming quality may make meals feel more satisfying, especially in cooler drinks or foods.

Ginger has a strong taste, so only a small amount is usually needed. It works well in savory meals and warm drinks. Fresh ginger can be added to stir-fries, smoothies, or hot tea. Small amounts add flavor and may support metabolism without overwhelming the diet.

10. Avocado

Avocado provides healthy fats that support hormone balance and help the body absorb fat-soluble vitamins, contributing to steady energy and proper thyroid function. It is rich in monounsaturated fats, which support heart health and can help manage higher cholesterol often seen in people with hypothyroidism. Avocado supplies dietary fiber, which supports digestion and helps relieve constipation—a common symptom of an underactive thyroid.

One medium avocado provides several grams of fiber, contributing to daily needs. This fruit also contains small amounts of potassium, magnesium, and vitamin E, which support muscle function and help protect cells from oxidative damage. While it does not contain high iodine levels, avocado fits well into a balanced eating plan that includes safe iodine sources.

Its soft texture also makes it easy to combine with many meals without much preparation. Because avocado is naturally filling, it may also help support steady meal portions. It pairs well with both savory and mild foods, which makes regular use easier in different meals.

11. Pumpkin Seeds

Pumpkin seeds are rich in zinc, iron, magnesium, selenium, fiber, and healthy fats. These nutrients support thyroid health and help sustain energy and metabolism. Zinc is critical for thyroid hormone production and helps maintain normal hormone balance. Pumpkin seeds also provide small amounts of selenium, a trace mineral that helps convert thyroid hormone into its active form.

Iron supports red blood cell production and helps carry oxygen through the body, which may help reduce fatigue in people with hypothyroidism. Magnesium supports muscle function and steady nerve signaling, which may help when low thyroid function causes muscle heaviness or sluggishness. Fiber aids digestion and helps relieve constipation, a common symptom of an underactive thyroid.

Healthy fats support absorption of fat-soluble vitamins and contribute to overall health. For practical use, pumpkin seeds can be sprinkled on yogurt or oatmeal. They also work well in salads, smoothies, or as a roasted snack.

12. Coconut Oil

Coconut oil is a plant-based fat that contains medium-chain triglycerides (MCTs). The body can use these fats quickly for energy. For people with hypothyroidism, small amounts of coconut oil can help support steady energy, although it does not treat an underactive thyroid. The thyroid regulates how the body uses energy.

Slowed thyroid function can lead to fatigue and weight gain. Coconut oil provides supplemental energy that can complement overall nutrient intake. It is also high in saturated fat, so it should be used in moderation to protect heart health. This is especially important for people with hypothyroidism who may have elevated cholesterol.

For practical use, coconut oil can be added in small amounts to oatmeal or smoothies. It can also be used for light sautéing or replacing butter in baked goods. It works best as part of a balanced diet with fruits, vegetables, whole grains, lean protein, and healthy fats.

13. Sweet Potato

Sweet potatoes provide complex carbohydrates that digest slowly, offering steady energy to help counter fatigue associated with hypothyroidism. They are rich in dietary fiber, which supports regular bowel movements. This helps with constipation, a common concern for people with an underactive thyroid. Eating sweet potatoes with the skin adds extra fiber.

Sweet potatoes also supply vitamin A in the form of beta-carotene. This nutrient supports the immune system and helps maintain healthy skin, which can be helpful when low thyroid hormone levels contribute to dryness. They also contain vitamin C, which helps support iron absorption and contributes to normal tissue repair.

Sweet potatoes also provide small amounts of potassium and iron. Potassium supports muscle and nerve function. Iron helps red blood cells carry oxygen through the body. For practical use, sweet potatoes can be baked, roasted, or steamed to preserve nutrients. They pair well with lean protein and healthy fats as part of a balanced meal.

14. Tomatoes (Selenium-Rich)

Tomatoes contain small amounts of selenium, a trace mineral that supports thyroid function by helping the body produce antioxidant enzymes that protect thyroid cells from damage. Selenium content varies depending on the soil where tomatoes are grown, but regular consumption contributes to daily intake.

Low selenium levels can worsen thyroid problems, particularly in areas with selenium-deficient soil. One medium tomato also provides vitamin C and potassium, which support general health and help the body manage stress and inflammation. Fresh tomatoes, canned tomatoes, and tomato sauce all provide similar benefits. For practical use, tomatoes can be added to salads, soups, stews, or sandwiches.

Cooking may increase the availability of some nutrients, making sauces and stews particularly beneficial. Tomatoes alone do not meet daily selenium needs. Adults require about 55 micrograms per day. They should be combined with other selenium-rich foods such as fish, eggs, and whole grains to support a balanced diet.

15. Mushrooms (Riboflavin-Rich)

Mushrooms provide riboflavin (vitamin B2), which helps the body release energy from carbohydrates, fats, and proteins. This supports daily function and helps reduce fatigue, a common symptom in people with hypothyroidism. Riboflavin also supports healthy skin, eyes, and nerve function. Mushrooms contain small amounts of selenium, which supports normal thyroid function and helps meet daily needs through regular food intake.

They also provide copper, a mineral that supports iron use and helps maintain normal energy production. Some mushrooms exposed to sunlight contain vitamin D, which supports immune function and bone health. Because the body does not store riboflavin for long, regular consumption is important. Adults generally need about 1.1–1.3 milligrams per day.

Mushrooms also provide fiber and antioxidants, which support overall health and a balanced diet. Common varieties include white button, cremini, portobello, and shiitake. They are low in calories, cook quickly, and can be added to eggs, soups, stir-fries, or whole grains.