Iodine-based contrast agents are substances used in medical imaging to enhance the visibility of internal structures in the body. They contain iodine, which is effective at blocking X-rays, making it easier to see organs, blood vessels, and tissues during procedures like CT scans and X-rays. These agents can be administered orally or intravenously, depending on the type of imaging required. While generally safe, some patients may experience allergic reactions or side effects, so healthcare providers assess individual risks before use. Iodine-based contrast agents play a crucial role in diagnosing various medical conditions.