In today’s evolving landscape of regenerative medicine and performance science, therapeutic peptides are increasingly discussed in clinical practice and professional athletics alike. As interest grows, so do questions surrounding detectability, laboratory testing, and regulatory implications—particularly within professional sports, where anti-doping standards demand scientific clarity rather than assumption. Peptide Clearance and Detectability: Physiological Reality and Laboratory Limits provides that clarity. This chapter offers a rigorous, evidence-based examination of how therapeutic peptides behave in the human body, why most are rapidly degraded through intrinsic enzymatic pathways, and why laboratory confirmation of prior use is far more limited than commonly believed. Drawing from established peptide physiology and anti-doping literature, it distinguishes between what is technically possible in elite analytical laboratories and what is realistically achievable in routine clinical or compliance settings. For sports medicine physicians, performance scientists, team medical staff, and regulatory professionals, understanding peptide pharmacokinetics is essential. Peptides function as biological signals—not persistent chemical agents—and their transient nature has direct implications for testing, policy development, and athlete education. This chapter does not promote misuse; rather, it provides scientifically grounded insight into the realities of peptide clearance and detection. In an era where professional sports demand both innovation and accountability, informed decision-making must rest on physiology—not speculation. by Mark L. Gordon, MD 8 Pages. 20 References.
