Hypothyroidism is the result of an underactive thyroid that does not produce the proper amount of hormones. The condition primarily affects women over the age of 50. While hypothyroidism does not produce symptoms in the early stages of the disease, over time it can cause problems such as obesity, infertility, joint pain and heart disease. Medication is used to treat the condition, but the Mayo Clinic reports that diet therapy is vital to proper absorption of the medicine.
Soy
Researchers at the Mayo Clinic report that large amounts of soy can interfere with the absorption of hypothyroidism medications. Complete avoidance of the ingredient isn't required, although patients taking hypothyroid medicines should wait at least four hours after taking their medication to eat any products containing soy.
Fiber
Like soy, patients should avoid foods high in fiber, such as whole grain bread and cereals, immediately following a dose of medication. Other foods that should not be taken with hypothyroid medications include walnuts, peanuts and pine nuts.
Supplements
The Mayo Clinic also suggest avoiding calcium and iron supplements for at least four hours after taking medication to make sure the medicine is properly absorbed in the system. The same guidelines apply to antacids that contain magnesium or aluminum.
Interfering Foods
University of Maryland Medical Center (UMMC) says patients with underactive thyroids also should avoid foods that interfere with thyroid function, such as cabbage, broccoli and Brussels sprouts. Other foods that can upset regular thyroid function and interfere with the absorption of the medication include cauliflower, spinach and kale. It recommends thyroid patients avoid processed food such as white pasta, sugar and bread.
Allergens
If a patient is allergic to certain foods that haven't been identified yet, a doctor should perform an allergy test to confirm any reactions. Many people have gluten allergies or a lactose intolerance that has never been diagnosed, but may create additional barriers to recovery from hypothyroidism. Other common allergens that should be stricken from the diet include preservatives, corn and chemical additives.
Increase
To improve the absorption of hypothyroid medication and promote health, UMMC encourages patients to eat food that is high in vitamin B-12 and iron, like whole wheat and sea vegetables. Antioxidant foods such as blueberries, tomatoes and cherries make good complements to a dietary plan for treating hypothyroidism.
