Iodide is a chemical ion that contains iodine, a vital element for human health. It is commonly found in various forms, such as potassium iodide, and plays a crucial role in the production of thyroid hormones. These hormones help regulate metabolism, growth, and development in the body. A deficiency in iodide can lead to health issues like goiter and thyroid disorders. In nature, iodide is often present in seawater and certain foods, such as fish and dairy products. It is also added to table salt to prevent iodine deficiency in populations. Ensuring adequate iodide intake is essential for maintaining overall health and well-being.