Isoflavones in soy have long been suspected of harming the thyroid. Some studies think too much soy can cause hypothyroidism.
Iodine deficit can affect thyroid hormone synthesis, although broccoli and cabbage are high in fiber and minerals.
Los Angeles dietitian and Academy of Nutrition and Dietetics spokeswoman Ruth Frechman, RDN, advises hypothyroidism patients to avoid gluten, a protein found wheat, barley, rye, and other grains.
Nutrition, and diabetes at Boston Medical Center and associate professor at Boston University School of Drugs, says fats hinder thyroid hormone replacement drug absorption.
Frechman argues hypothyroidism slows metabolism. That implies you can easily gain weight if you're not careful.
People with hypothyroidism should avoid sodium, and processed foods have a lot. Too much sodium and an underactive thyroid increase high blood pressure risk.
Fiber is helpful, but too much can hinder hypothyroidism treatment. The government's Daily Guidelines for Americans recommend 25–38 grams of fiber for under-50s.
According to Thyroid, caffeine affects thyroid hormone replacement absorption. We didn't understand why thyroid medicine with coffee caused irregular thyroid levels.
Alcohol appears to poison the thyroid gland and inhibit thyroid hormone usage. Hypothyroidism patients should avoid alcohol or drink moderately.