Peptide Doping: A Critical Look at Performance Enhancement in Sports

The landscape of performance-enhancing drugs (PEDs) in both recreational and professional sports is constantly evolving, posing significant challenges to fair competition and athlete health. While traditional steroids are well-known, peptides and peptide-analog drugs have emerged as a new frontier for doping. This critical review synthesizes the current understanding of peptide use, prevalence, and associated risks within the athletic and bodybuilding communities.

The review identified over 50 distinct peptides and peptide analogs frequently reported in doping contexts, with GHRP-6 (a growth hormone-releasing peptide) and IGF-1 LR3 (an insulin-like growth factor variant) being the most prevalent, accounting for approximately 60% of detected cases in some anti-doping reports. Users often reported perceived benefits such as up to a 15% increase in lean muscle mass and 20% improvement in recovery times from intense training, though these are largely anecdotal. > The review highlighted a 3-fold increase in peptide doping detections in professional sports over the last five years, underscoring a significant and growing challenge for anti-doping agencies worldwide. Furthermore, adverse effects were documented in over 40% of reported cases, ranging from localized injection site reactions to more systemic issues like glucose dysregulation and potential long-term organ damage.