NOB-Health news: To maintain the balance of thyroid hormones in the body, medicines are needed to boost the immune system. But taking only medicines is not enough. Some dietary precautions must be taken. These are the 5 foods that patients with thyroid problems should not eat at all. Eating these can also impair the effectiveness of medications. Several studies suggest that thyroid patients should avoid soy foods. This can cause thyroid medications to malfunction. Soybeans, soy milk, tofu should be avoided. Vegetables like cabbage and cauliflower reduce the effect of thyroid medication. People suffering from these thyroid problems should avoid vegetables like cabbage. Packaged and processed foods can cause weight gain in thyroid patients. Increases physical problems. Such foods are high in salt and sugar. Avoid eating sweets if you have thyroid. Eat sugar in moderation. These make it difficult for people with thyroid problems to maintain weight. So sweet foods should be avoided. People with thyroid problems should not drink too much coffee. Do not drink coffee on an empty stomach. Do not drink coffee half an hour before or after taking thyroid medication.