The iodine test (Iodine, by HPLC) is used to measure iodine levels in biological samples such as blood or urine. This analysis relies on high-performance liquid chromatography (HPLC), allowing precise determination of iodine content. The test is important for assessing an individual’s nutritional status, especially in areas at risk of iodine deficiency, which can affect thyroid health. It is also used to monitor patients receiving iodine-related treatments, such as radioactive iodine for diagnosing and treating thyroid disorders. The results of this test help doctors make informed decisions regarding treatment and nutrition.