Thyroid disease is a disease which is caused due to the improper functioning of our thyroid gland and it is of two types Hyperthyroidism and Hypothyroidism. A person who is suffering from this disease should avoid soya and its other products. He should also avoid broccoli. Brussels’ sprouts, mustard and tofu. It is recommended to include dairy products, especially milk and foods that are rich in selenium like Onions, Eggs and mushrooms in your diet,.