How Anti-Doping Labs Detect Banned Peptides in Athletes' Blood and Urine | Research

The takeaway

This review explains why detecting peptide doping is so challenging — banned peptides disappear quickly and mimic natural hormones — and the advanced mass spectrometry techniques used to catch them.

Hours-long half-lives make detection extremely difficult
Most banned performance-enhancing peptides disappear from the body within hours and mimic natural hormones, requiring advanced LC-HRMS techniques and synthetic reference standards for reliable detection.

What the researchers found

Detecting peptide doping is one of the hardest challenges in anti-doping science because many performance-enhancing peptides have extremely short half-lives and are identical or nearly identical to natural hormones. This review covers the analytical strategies used to detect banned peptides from WADA sections S2 (peptide hormones and growth factors), S4 (hormone and metabolic modulators), and S5 (diuretics and masking agents).

The key detection tools include solid-phase peptide synthesis (SPPS) to create reference standards and isotopically labeled analogs for quantification, combined with liquid chromatography-high resolution mass spectrometry (LC-HRMS) for analysis in biological samples like blood and urine.

Why it matters

Peptide doping is widespread in sports but notoriously difficult to detect. Many banned peptides (GH secretagogues, EPO mimetics, IGF-1 analogs) clear the body in hours and look almost identical to natural hormones. This review consolidates the state of the art in detection methodology, which is critical as more peptides appear on the WADA banned list and athletes continue to seek performance-enhancing substances that evade testing.

The numbers in context

WADA sections S2, S4, S5 · LC-HRMS primary detection technique · SPPS for reference materials · SPE and protein precipitation for sample preparation

How the study worked

Comprehensive narrative review of the analytical chemistry behind peptide doping detection, covering synthetic reference material production, biological sample preparation methods, and instrumentation for peptide detection in complex biological matrices.

Who was studied

Review of analytical methods; no patient or athlete population studied directly

What this study cannot tell us

This is a methodological review focused on analytical techniques, not a study of doping prevalence or athlete outcomes. Detection sensitivity varies greatly between peptide types, and the review notes that many peptides still lack validated detection methods. The rapid pace of novel peptide development means detection methods quickly become outdated.

How to read the evidence

This is a comprehensive methodological review of analytical techniques for peptide doping detection, published in a peer-reviewed chemistry journal. It synthesizes existing detection strategies but does not present original detection data or validation studies.

When this study was published

Published in 2022. The analytical methods described (LC-HRMS, SPPS) remain current standard approaches. However, the peptide doping landscape evolves rapidly with new substances entering the market.

The bigger picture

As peptide therapeutics explode in mainstream medicine (GLP-1 drugs, growth hormone peptides), the potential for doping misuse grows alongside. Anti-doping science must keep pace with both pharmaceutical innovation and underground peptide markets. This review captures the current toolkit but highlights significant gaps where detection remains unreliable or impossible.

Questions still open

Can detection methods keep pace with the rapid proliferation of novel research peptides available online?
Should WADA invest in biomarker-based approaches (detecting biological effects) rather than directly detecting peptides that clear too quickly?
How should anti-doping policy handle peptides that are identical to endogenous hormones?

Common questions

Why is it so hard to detect peptide doping?

Most banned peptides break down in the body within hours and are chemically identical or nearly identical to natural hormones your body produces. This makes them much harder to detect than traditional doping agents like steroids, which linger in the body for weeks. Anti-doping labs need extremely sensitive equipment and synthetic reference standards to find traces.

What technology is used to detect banned peptides in athletes?

The primary tool is liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS), which can identify extremely small amounts of specific molecules in blood or urine. Labs also use solid-phase peptide synthesis to create exact copies of banned peptides and isotopically labeled versions for precise quantification.

Read the original research

Synthetic Peptides in Doping Control: A Powerful Tool for an Analytical Challenge.

ACS omega, 7(43), 38193-38206

View on PubMed ↗Publisher’s paper ↗

Citation

Gómez-Guerrero, Néstor Alejandro; González-López, Nicolás Mateo; Zapata-Velásquez, Juan Diego; Martínez-Ramírez, Jorge Ariel; Rivera-Monroy, Zuly Jenny; García-Castañeda, Javier Eduardo. (2022). Synthetic Peptides in Doping Control: A Powerful Tool for an Analytical Challenge.. ACS omega, 7(43), 38193-38206. https://doi.org/10.1021/acsomega.2c05296