WADA 2026 Prohibited List: Peptide Guide for UK Athletes

The World Anti-Doping Agency (WADA) Prohibited List is updated annually and takes effect each January. The 2026 list maintains and expands prohibitions on numerous peptide substances relevant to UK athletes.

Key prohibited peptide categories:

S2.2 — Peptide Hormones, Growth Factors, Related Substances and Mimetics: This is the primary category covering peptides. It includes:

1. Erythropoietins (EPO) and agents affecting erythropoiesis 2. Growth Hormone (GH), its fragments, and releasing factors: - Growth hormone (somatropin) - Growth hormone-releasing hormone (GHRH) and analogues: CJC-1295, sermorelin, tesamorelin - Growth hormone secretagogues (GHS): ipamorelin, GHRP-2, GHRP-6, hexarelin, macimorelin - GH-releasing peptides of all kinds 3. Insulin-like Growth Factors (IGF-1) and analogues 4. Mechano Growth Factors (MGF) 5. Thymosin-beta 4 (TB-500) and its derivatives

S4.4 — Metabolic Modulators: - GLP-1 receptor agonists including semaglutide and tirzepatide are currently NOT prohibited by WADA - However, this could change in future lists, and some sports federations have additional rules

S0 — Non-Approved Substances: - Any substance not approved for human therapeutic use by any governmental regulatory health authority is prohibited - This explicitly covers BPC-157, which has no regulatory approval anywhere - Also covers novel research peptides not yet in clinical trials

The S0 category is frequently overlooked but extremely important — it means virtually ALL research peptides are prohibited for athletes, even if not named specifically on the list.

Here is a detailed breakdown of commonly discussed peptides and their status under WADA 2026 rules.

Prohibited at all times (in and out of competition):

• •BPC-157: Prohibited under S0 (non-approved substance). No therapeutic use exemption possible as it has no approved medical use
• •TB-500 (Thymosin Beta-4): Explicitly prohibited under S2.2
• •CJC-1295: Prohibited under S2.2 as a GHRH analogue
• •Ipamorelin: Prohibited under S2.2 as a growth hormone secretagogue
• •GHRP-2 and GHRP-6: Prohibited under S2.2
• •Sermorelin: Prohibited under S2.2 as a GHRH analogue
• •Hexarelin: Prohibited under S2.2
• •IGF-1 (Mechano Growth Factor): Prohibited under S2.2
• •Follistatin: Prohibited under S2.2 (related substance affecting myostatin)
• •AOD-9604: Prohibited under S0 (non-approved substance)

NOT currently prohibited:

• •Semaglutide (Ozempic/Wegovy): Not on the prohibited list. Athletes can use it with a prescription
• •Tirzepatide (Mounjaro): Not currently prohibited
• •Liraglutide (Saxenda/Victoza): Not currently prohibited
• •Insulin: Prohibited under S4.4 UNLESS the athlete has a Therapeutic Use Exemption (TUE) for diabetes
• •Collagen peptides (oral): Not prohibited — these are food supplements
• •GHK-Cu (topical): Not explicitly prohibited, but athletes should verify with their sport's anti-doping authority

Grey areas: - Topical peptides in cosmetic products: Generally permitted, but athletes should check with UKAD - Peptide-containing foods and supplements: Permitted, but contamination risk exists - Oral peptide supplements marketed for gut health: Generally permitted if they do not contain prohibited substances

UK Anti-Doping (UKAD) is responsible for implementing WADA rules in the United Kingdom. Understanding how testing works is essential for any UK athlete.

Who gets tested: - All athletes in UKAD's Registered Testing Pool (national and international level) - Athletes in UKAD's Domestic Testing Pool - Any athlete competing in national championships or selected events - Recreational athletes competing in events governed by national federations - Parkrun does not drug test, but competitive road races, triathlons, and most organised sports do

How peptide testing works: - Urine and blood samples are collected - Testing laboratories use mass spectrometry and immunoassay techniques - Peptide detection windows vary significantly: - GH secretagogues: Detectable for hours to days after use - TB-500: Detection methods have improved significantly; detectable for weeks - BPC-157: Detection methods are evolving; current tests can identify metabolites - Synthetic GH: Detectable via isoform test for 24–48 hours, or biomarker test for up to 3 weeks

Important developments in 2026: - WADA-accredited laboratories have improved peptide detection capabilities significantly - New methods can detect BPC-157 metabolites that were previously undetectable - The Athlete Biological Passport (ABP) can flag suspicious patterns even without a positive test - Dried blood spot testing is being introduced, making out-of-competition testing easier

Consequences of a positive test: - First offence: Typically a 4-year ban from all competition - Second offence: Up to 8 years or lifetime ban - Results from your sport are stripped retroactively - Public disclosure of the violation - Loss of funding, sponsorship, and team selection - Some violations can result in criminal prosecution under UK law

Whereabouts requirements: Athletes in testing pools must provide quarterly whereabouts information. Three missed tests or filing failures within 12 months constitute an anti-doping rule violation, equivalent to a positive test.

A Therapeutic Use Exemption allows an athlete to use a prohibited substance for a legitimate medical condition. However, TUEs for peptides are limited and strictly controlled.

TUE basics: - You must apply BEFORE using the substance (retroactive TUEs are only granted in emergencies) - A TUE committee reviews the application - The medical condition must be documented by an independent physician - There must be no permitted therapeutic alternative - The substance must not enhance performance beyond returning to normal health

Peptides where TUEs are possible:

1. Insulin: TUEs are routinely granted for athletes with type 1 diabetes. Application requires documented diagnosis, HbA1c results, and specialist confirmation

2. Growth Hormone: TUEs may be granted for documented adult growth hormone deficiency. Requires dynamic testing (insulin tolerance test or glucagon stimulation test) at a specialist centre, and the deficiency must be established by an endocrinologist

3. Desmopressin: TUEs may be granted for diabetes insipidus or documented nocturnal enuresis with specialist verification

4. GnRH analogues: May be granted for endometriosis, prostate cancer, or other documented medical conditions requiring hormonal manipulation

Peptides where TUEs are NOT possible:

• •BPC-157: No approved medical use, so a TUE cannot be granted
• •TB-500: Same — no approved therapeutic indication
• •CJC-1295 and ipamorelin: No approved therapeutic use
• •AOD-9604: No approved therapeutic use

The TUE application process in the UK: 1. Discuss with your doctor and obtain comprehensive medical documentation 2. Complete the UKAD TUE application form 3. Submit with all supporting medical evidence 4. A TUE committee of three physicians reviews the application 5. Decision typically within 21 days 6. Appeals process available if declined

Practical advice: If you are an athlete with a medical condition that might benefit from peptide therapy, consult both a sports medicine physician familiar with anti-doping rules and the relevant specialist for your condition.

Navigating the intersection of peptide research interest and anti-doping compliance requires caution and awareness.

Golden rules for UK athletes:

1. Check every substance on Global DRO (globaldro.com) — this is the official resource for checking whether a medication or supplement is prohibited in sport. It covers UK-specific information

2. The principle of strict liability applies — you are responsible for everything in your body, regardless of how it got there. "I didn't know it was banned" is not a defence

3. Supplement contamination is real — studies show 10–25% of supplements contain undeclared substances that could trigger a positive test. Use only Informed Sport-certified products

4. Be cautious with overseas supplements — peptide-containing products from abroad may contain prohibited substances not listed on the label

5. Document everything — if you use any medication, keep records of prescriptions, pharmacy receipts, and prescriber details

Safe peptide options for athletes: - Collagen peptides (oral): Not prohibited, evidence for joint and tendon health - Topical cosmetic peptide products: Generally not prohibited (verify with UKAD) - Licensed GLP-1 agonists (if prescribed): Not currently prohibited - Over-the-counter peptide supplements: Check each product individually

Resources for UK athletes: - UKAD: ukad.org.uk (official anti-doping body) - Global DRO: globaldro.com (substance checker) - WADA Prohibited List: wada-ama.org/en/prohibited-list - Informed Sport: informed-sport.com (supplement certification) - UKAD Athlete Advisor Line: For confidential questions

If you are considering retirement from sport: Some athletes explore peptides after retiring from competitive sport. Be aware that retired athletes in testing pools must formally withdraw from the pool. If you resume competition, a period of advance notice is required during which you may be tested.

*This guide is for informational purposes only. Anti-doping rules change annually. Always verify current prohibited status through official channels before using any substance.*