Hashimoto’s diet: what to eat and what to limit

Is there a special Hashimoto’s diet?

There is no established diet that cures Hashimoto’s or replaces thyroid hormone when it is needed. Hashimoto’s is an autoimmune condition: the immune system attacks the thyroid, which may eventually make too little hormone. This is called hypothyroidism.

Food choices can support nutrition and general health. That is different from proving that a particular diet stops the autoimmune process, repairs the thyroid, or reliably relieves Hashimoto’s symptoms.

What can I eat with Hashimoto’s?

Start with a varied eating pattern you can maintain, rather than a long list of forbidden foods. Options include:

• Vegetables and fruit: choose a variety, including fresh or frozen options.
• Whole grains: oatmeal, brown rice, or whole-grain bread, unless a separate condition requires you to avoid a particular grain.
• Protein: beans, lentils, eggs, fish, poultry, or other foods that fit your needs and preferences.
• Nuts, seeds, and unsaturated fats: options include walnuts, pumpkin seeds, avocado, and olive oil.
• Dairy or suitable alternatives: choose foods you tolerate and consider their protein and calcium content.

For example, try oatmeal with berries and yogurt, or a bowl of rice, vegetables, and beans or fish. Choose ingredients and portions that fit your needs.

Which foods should I limit?

Cutting back on sugary drinks and frequent sweets can improve the overall quality of your diet. Choose water more often and compare labels for added sugar and sodium. These are general health steps, not a proven way to lower thyroid antibodies.

Hashimoto’s alone is not a reason to remove whole food groups. If you are advised to avoid a food, ask what problem the restriction is meant to address and how to replace any nutrients you would lose.

Do I need to stop eating gluten or dairy?

A Hashimoto’s diagnosis does not automatically mean you need a gluten-free diet. Research in people without celiac disease has not established a consistent benefit for thyroid function or symptoms. Some studies report changes in blood markers, but that is not the same as showing that people feel better.

A gluten-free diet is needed for celiac disease, a separate condition. If you have ongoing digestive symptoms, unexplained nutrient deficiencies, or a family history of celiac disease, ask whether testing is appropriate. Discuss testing before removing gluten, because doing so can affect the results.

Dairy restrictions also depend on an individual reason, such as an allergy or intolerance. If you cut out a food group, a registered dietitian can help you replace the nutrients it supplies.

What about iodine, selenium, and other supplements?

Iodine and seaweed

The thyroid needs iodine, but excess iodine can worsen autoimmune thyroid problems. Kelp, some other seaweeds, and iodine supplements can supply large amounts. Do not use them as a treatment for Hashimoto’s. Pregnancy changes iodine needs, so discuss supplements with your clinician if you are pregnant or planning pregnancy.

Selenium

Selenium is important for thyroid function, but a supplement is not automatically helpful. In a 2024 trial of 412 adults taking levothyroxine for autoimmune hypothyroidism, selenium lowered thyroid antibodies but did not improve quality of life more than placebo over 12 months.

Too much selenium can be harmful. Brazil nuts contain high and variable amounts, so do not use large daily quantities as a thyroid treatment or combine them with high-dose supplements without discussing your intake.

Vitamin and mineral deficiencies

If a deficiency is identified, your clinician can recommend a suitable replacement and follow-up. That is different from taking several nutrients to treat Hashimoto’s without knowing whether you need them. Ask which tests, if any, make sense for your symptoms, diet, and medical history.

Can food affect my thyroid medicine?

Yes. Food and some supplements can affect how well levothyroxine is absorbed. Take it consistently as prescribed and ask how to separate it from meals, iron, calcium, and other medicines or supplements.

You do not necessarily need to stop eating a food because it affects absorption. The timing may be what needs adjusting. Tell your care team about major diet changes or new supplements, and ask whether follow-up thyroid blood tests are needed.

What if I still feel unwell?

Continuing fatigue, constipation, or other symptoms deserve a follow-up conversation. Review your thyroid results, medicine timing, diet, and other possible causes with your clinician. Symptoms alone cannot tell you whether you need a different thyroid dose, a supplement, or a restrictive diet.

Autoimmune inflammation is being studied, but antibody levels do not by themselves explain every symptom or tell you which foods to avoid.

Questions to ask your care team

• Is there a reason I should avoid a food, or can I keep a varied diet?
• Should I be tested for celiac disease before changing my diet?
• Do I have a deficiency that needs treatment?
• How should I time my thyroid medicine with meals and supplements?