What foods should I avoid if I have an underactive thyroid?

Univ. of Nev. School of Medicine, Family Medicine

In general, there are no particular foods to avoid if you have an underactive thyroid (hypothyroidism). However, if you are taking levothyroxine (Synthroid) for your underactive thyroid, you should avoid foods that may interfere with absorption of the drug from the gastrointestinal tract. These foods include:

soy (including soy formula and nutritional products)
grapefruit juice
espresso coffee
cottonseed meal
walnuts
dietary fiber

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.

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What foods should I avoid if I have an underactive thyroid?

Continue Learning about Thyroid Disorders