👉 Thyroid iodine is a rare, naturally occurring substance found in human body cells. It's crucial for thyroid gland function and development, but it can also be toxic if consumed or stored improperly. In humans, thyroid iodine is essential for the production of thyroid hormones, which regulate metabolism and energy production. It helps to maintain a normal balance of thyroid hormones within the body, promoting overall health and wellness. Thyroid iodine is not found naturally in the diet but can be synthesized from