Individuals with thyroid issues should avoid consuming millet. Millets contain goitrogens, which are substances that may hinder the absorption of iodine. This can be a concern for individuals with thyroid issues, as iodine is essential for the proper functioning of the thyroid gland. While the cooking process may reduce the levels of goitrogens in millet, it does not completely eliminate them. Therefore, it is advisable for individuals with thyroid issues to avoid millet consumption to prevent any potential interference with iodine absorption.