Contents
Key findings
- 1Most peptides discussed for performance or recovery are prohibited in sport at all times - in competition and out of competition.
- 2BPC-157 is prohibited under S0 (non-approved substances); TB-500 and thymosin-β4 under S2.3 (growth factors).
- 3The growth-hormone peptides - CJC-1295, sermorelin, tesamorelin and ipamorelin - are prohibited under S2 as growth hormone-releasing factors and secretagogues.
- 4Approved metabolic and sexual-health peptides such as semaglutide, tirzepatide and bremelanotide are not currently named on the Prohibited List, but athletes should still verify with their anti-doping organisation.
- 5Anti-doping status is separate from FDA status and from whether a peptide works - a substance can be banned in sport, unapproved by the FDA, and unproven, all at once.
Evidence level
The classifications here are read directly from the WADA 2026 Prohibited List, verified against the World Anti-Doping Agency source on 2026-08-18. Anti-doping status is a regulatory fact, separate from evidence of effectiveness.
Regulatory status
WADA anti-doping status is distinct from FDA approval status. A peptide can be prohibited in sport whether or not it is FDA-approved, and a peptide not named on the list is not thereby endorsed as safe or legal to use.
For anyone subject to drug testing, the anti-doping question is not optional and not the same as "is this legal" or "does this work." Most of the peptides discussed for muscle, recovery and performance are prohibited in sport at all times. Here is exactly which category each falls under.
The short answer
Under the World Anti-Doping Agency (WADA) 2026 Prohibited List, verified against the WADA source:
- BPC-157 - prohibited under S0 (non-approved substances)
- TB-500 / thymosin-β4 - prohibited under S2.3 (growth factors)
- CJC-1295, sermorelin, tesamorelin, ipamorelin - prohibited under S2 (growth hormone-releasing factors and secretagogues)
- Semaglutide, tirzepatide, bremelanotide (PT-141), GHK-Cu, collagen peptides - not currently named on the list
"Prohibited at all times" means both in competition and out of competition. There is no season or window in which these become permissible for a tested athlete.
How WADA's categories work
The Prohibited List is organised into sections. Three matter for the peptides we cover[1]:
S0 - Non-approved substances. A catch-all for any pharmacological substance with no current approval by any government health authority for human therapeutic use - drugs in or abandoned from development, designer compounds, and substances approved only for veterinary use. BPC-157 sits here precisely because it is not approved anywhere for people.
S2 - Peptide hormones, growth factors, related substances and mimetics. This is the section built for exactly this class of compound. Within it:
- Growth hormone-releasing factors - GHRH and its analogues (CJC-1295, sermorelin, tesamorelin) and growth hormone secretagogues (ipamorelin and related GHRPs). These raise the body's own growth hormone, which is why they are grouped with GH itself[2].
- S2.3 Growth factors - substances affecting muscle, tendon or ligament protein synthesis, vascularisation or regenerative capacity. Thymosin-β4 and its derivatives such as TB-500 are named here.
The mapping, in full
| Peptide | WADA category | Status |
|---|---|---|
| BPC-157 | S0 - non-approved substances | Prohibited at all times |
| TB-500 / thymosin-β4 | S2.3 - growth factors | Prohibited at all times |
| CJC-1295 | S2 - GH-releasing factors | Prohibited at all times |
| Ipamorelin | S2 - GH secretagogues | Prohibited at all times |
| Tesamorelin | S2 - GH-releasing factors | Prohibited at all times |
| Semaglutide | Not currently listed | Verify with your ADO |
| Tirzepatide | Not currently listed | Verify with your ADO |
| Bremelanotide (PT-141) | Not currently listed | Verify with your ADO |
| GHK-Cu (copper peptide) | Not currently listed | Verify with your ADO |
| Collagen peptides | Not listed (food) | Permitted |
Two cautions that matter more than the categories
"Not listed" is not "safe" or "legal." The Prohibited List exists to protect fair competition, not to vet consumer products. A peptide absent from the list can still be an unapproved drug of unverified content - see our analysis of certificates of analysis. And the list changes: it is revised annually, and WADA operates monitoring programmes on substances it is watching. Anyone subject to testing should confirm current status with their own anti-doping organisation rather than rely on any article, including this one.
Contamination is a real route to a positive test. Because many of these peptides are sold as unregulated "research" products, an athlete taking one supplement could be exposed to a prohibited peptide that is not on the label. The purity problem that affects consumers also affects test results.
Where to go next
- FDA-approved, off-label, investigational and unapproved peptides - the regulatory categories in the U.S.
- FDA-approved vs proven effective - why regulatory status and evidence are separate.
- Regulation and approval hub
- Peptide purity, contamination and the limits of a certificate of analysis
Frequently asked questions
- Is BPC-157 banned by WADA?
- Yes. BPC-157 is prohibited at all times under S0, the non-approved substances category, because it has no approval for human therapeutic use by any government health authority.
- Is TB-500 banned in sport?
- Yes. Thymosin-β4 and its derivatives, including TB-500, are named under S2.3 (growth factors) and are prohibited at all times.
- Are CJC-1295 and ipamorelin banned?
- Yes. Both are prohibited under S2 - CJC-1295 as a growth hormone-releasing hormone analogue and ipamorelin as a growth hormone secretagogue.
- Is semaglutide or tirzepatide banned in sport?
- They are not currently named on the WADA Prohibited List. That can change - the list is updated annually and WADA runs monitoring programmes - so athletes should always confirm with their anti-doping organisation before use.
- Does "not on the list" mean a peptide is safe?
- No. The Prohibited List is about fair competition, not consumer safety or legality. A peptide can be off the list and still be an unapproved drug of unverified quality.
References
Numbered in order of first use. Study type is shown for every source; see our methodology for how we rank evidence.
- 1.
The Prohibited List (2026) World Anti-Doping Agency, 2026.
Regulatory source
Result: The 2026 Prohibited List classifies BPC-157 under S0, thymosin-β4/TB-500 under S2.3 growth factors, and growth hormone-releasing factors (GHRH analogues such as CJC-1295, sermorelin and tesamorelin) and secretagogues (such as ipamorelin) under S2.
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Growth Hormone Releasing Factors - explanatory note World Anti-Doping Agency.
Regulatory source
Result: WADA identifies GHRH and its analogues (e.g. CJC-1295, sermorelin, tesamorelin) and GH secretagogues (e.g. ipamorelin) as prohibited growth hormone-releasing factors under S2.
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Review status: Editorially reviewed against primary sources. This article was fact-checked against the primary sources listed in the references by our editorial team, and it has not been reviewed by a licensed clinician. It is educational content, not medical advice. Read our editorial policy and methodology. Spotted an error? Tell us.
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