The body uses iodine to make thyroid hormones, which direct metabolism, growth, and development. Many people take it to keep the thyroid working normally, particularly where diets fall short on the mineral. Food sources include seaweed, iodized salt, and fish. Supplemental forms such as potassium iodide are common. Take iodine with a meal to reduce stomach upset.
Excess iodine can disrupt thyroid function. Stick to recommended amounts. Anyone with a thyroid disorder or autoimmune condition should be careful with this supplement.