What type of substance is HGH classified as within the context of related substances?

Human Growth Hormone (HGH) is classified as a banned substance in the context of professional sports, including the NFL. This classification arises from its nature as a performance-enhancing drug that can give athletes an unfair advantage by promoting muscle growth, improving recovery times, and enhancing overall athletic performance. Consequently, its use is prohibited under the league's drug policies, aligning with policies of other major sports organizations and regulations set forth by anti-doping agencies worldwide.

Understanding the implications of HGH being a banned substance is vital for players, agents, and all stakeholders in professional sports, as its use can lead to significant penalties, including suspensions and fines. It is also important to recognize the difference between a banned substance and substances that may be legally prescribed or allowed under certain conditions. The distinction is essential for compliance with league rules and maintaining the integrity of competition.