Banned substances are specific drugs or chemicals that are prohibited in various contexts, such as sports, workplaces, and schools. These substances can enhance performance, pose health risks, or violate ethical standards. Organizations like the World Anti-Doping Agency (WADA) maintain lists of these substances to ensure fair competition and safety. In sports, athletes may face penalties for using banned substances, which can include suspensions or disqualifications. Common examples include steroids, stimulants, and certain hormones. Awareness of banned substances helps promote integrity and health in competitive environments, ensuring that all participants compete on a level playing field.