Toxicokinetics, the study of how a substance enters, moves through, and exits the body, is crucial in toxicology. Understanding the toxicokinetics of a substance helps in determining the dose-response relationship, which is essential for risk assessment and setting safety standards. Recent advancements in toxicokinetics have included exploring genetic factors influencing individual responses to toxicants, known as toxicogenomics. These studies help identify populations at risk and inform personalized medicine approaches.