The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration - Report - MDSpire

The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration

  • By

  • Aleksander Dominikowski

  • Zofia Rękoś

  • Michał Olejarz

  • Ewelina Szczepanek-Parulska

  • Remigiusz Domin

  • Marek RuchaŁa

  • June 18, 2026

  • 0 min

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Clinical Report: The Evolving Role of Performance-Enhancing Peptides

Overview

This report examines the use of performance-enhancing peptides (PEPs) that target the GH-IGF-1 pathway, highlighting their unregulated status and associated adverse effects. It emphasizes the need for clinicians to understand the implications of these substances in patient care.

Background

The increasing popularity of performance-enhancing drugs (PEDs), particularly among fitness enthusiasts, raises significant clinical concerns. Many individuals self-administer unregulated peptides to achieve aesthetic and performance goals, often without medical oversight. This trend necessitates a comprehensive understanding of the potential risks and benefits associated with these compounds.

Data Highlights

No specific numerical data or trial data presented in the article.

Key Findings

  • PEPs, including GHRH analogues and IGF-1 analogues, are commonly used off-label despite lacking regulatory approval.
  • Adverse effects of PEPs include endocrine disturbances, fluid retention, and musculoskeletal symptoms.
  • Clinical evidence suggests that while GH may increase lean body mass, it does not significantly enhance strength or aerobic capacity.
  • There is a lack of standardized dosing and product composition in unregulated supply chains, complicating clinical assessments.
  • Clinicians require a framework to evaluate symptoms and laboratory abnormalities in patients using PEPs.

Clinical Implications

Healthcare professionals should be aware of the growing trend of PEP use among patients and the associated risks. A structured assessment approach is essential for managing patients who self-administer these substances, focusing on symptom evaluation and risk communication.

Conclusion

The use of performance-enhancing peptides presents significant clinical challenges due to their unregulated nature and potential for adverse effects. Clinicians must remain vigilant and informed to provide appropriate care for affected patients.

Related Resources & Content

  1. Associated Press Health, AP News, 2023 -- What’s behind the trendy peptide injections being sold by influencers and RFK Jr. allies
  2. the medicine maker, The Medicine Maker, 2023 -- GLP-1 Analysis: Riding the Wave of Peptide Innovation
  3. The Journal of Clinical Endocrinology & Metabolism, 2023 -- Outcomes of Near-Adult Height in Patients Administered rhIGF-1 for Severe Growth Failure: Insights from the IGFD Registry Data
  4. conexiant, Conexiant, 2023 -- Peptides Are Outrunning the Rulebook
  5. Pituitary (2025) 28:57, 2025 -- Consensus and controversies about diagnosing GH deficiency
  6. Effects of tesamorelin, a growth hormone-releasing factor, in HIV-infected patients with abdominal fat accumulation: a randomized placebo-controlled trial with a safety extension - PubMed, 2010
  7. Prohibited List | World Anti Doping Agency, WADA, 2023 -- Prohibited List
  8. Pituitary (2025) 28:57
  9. Effects of tesamorelin, a growth hormone-releasing factor, in HIV-infected patients with abdominal fat accumulation: a randomized placebo-controlled trial with a safety extension - PubMed
  10. Prohibited List | World Anti Doping Agency

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