Millet should not be consumed by individuals with thyroid issues. This is because millets contain goitrogens, which can interfere with the absorption of iodine in the body. Iodine is essential for the proper functioning of the thyroid gland, so individuals with thyroid issues need to be cautious about their iodine intake. While some of the goitrogens in millet can be reduced during the cooking process, they may not be completely eliminated. Therefore, it is recommended that individuals with thyroid issues avoid consuming millets to prevent any potential adverse effects on their thyroid function.