WADA S0 — every banned non-approved substance for tested athletes (2026 list)
WADA category S0 is the catch-all "Non-approved substances" tier on the World Anti-Doping Code Prohibited List. It bans any substance that does not have current approval by a stringent regulatory authority for human therapeutic use. For research-peptide-buying athletes, S0 is the most important category to understand — most of what the typical vendor sells falls under it, including BPC-157, TB-500, and several growth-factor peptides. The 2022 specification of BPC-157 by name in S0 made the category enforcement-relevant for the peptide segment specifically.
WADA category S0 was created to address compounds that have left clinical development without reaching approval but are sold in research-chemical channels and used for performance enhancement. The category language is broad: "Any pharmacological substance which is not addressed by any of the subsequent sections of the List and with no current approval by any governmental regulatory health authority for human therapeutic use is prohibited at all times." That covers research-chemical peptides by definition.
The 2022 update specified BPC-157 by name in S0 — a notable enforcement move because BPC-157 is the most-commonly-sold research peptide in the vendor catalogue. Before the named-listing, BPC-157 was nominally in S0 by virtue of the catch-all language; after the listing, it is explicit. Athletes who tested positive for BPC-157 from the 2022 list onwards have been sanctioned under the named-substance posture.
Other peptides commonly sold in the research vendor catalogue and falling under S0: TB-500 (Thymosin Beta-4 fragment), Epithalon, Selank, Semax, GHK-Cu in injectable form. Peptides in other WADA categories: growth-hormone secretagogues (CJC-1295, Tesamorelin, Sermorelin, Ipamorelin) are under S2.5 — Growth Hormone Releasing Factors and their analogues; melanotan family (PT-141, Melanotan II) are not on the List but should be checked annually; insulin-mimetics like Tirzepatide and Semaglutide approved as drugs are not in S0 but can fall under S4 (hormone modulators) depending on use context.
USADA enforcement of S0 in the United States has accelerated since 2022. Multiple US athletes in MMA, strongman, and competitive shooting have received bans for BPC-157 testing positive. The window of detectability for BPC-157 is short (peptides clear the bloodstream within hours of injection) but the urinalysis test catches metabolites for several days post-administration, and out-of-competition testing has caught athletes who timed their use poorly.
For tested athletes, the practical posture is unambiguous: do not use research peptides while subject to anti-doping testing. The risk-reward is one-sided — a 2-year first-offence ban is the typical sanction for an S0 positive, against no validated performance benefit in elite athletes. If the use is for legitimate research outside competitive context, the S0 prohibition does not apply (it is specific to in-competition and out-of-competition athlete testing), but cross-contamination risk into the testing window is real.
For non-tested athletes — recreational lifters, hobbyist runners, biohackers without a sports body affiliation — WADA rules do not apply and S0 is informational rather than prohibitive. The legal status under FDA / FTC framework (covered in [the US legal status article](/research/fda-research-peptides-us-legal-status-2026)) is the relevant guidance instead.
The PeptideGuide methodology weights peptide listings without reference to WADA status — we list every research peptide a vendor offers, and we do not pre-filter by sport-doping rules. That is the athlete's responsibility. We do flag commonly-sport-tested peptides (BPC-157, TB-500, the GH secretagogues) on the molecule pages so tested athletes can self-screen.
15-amino-acid peptide derived from a protective protein in gastric juice. Most-researched peptide in the vendor market.
Synthetic fragment of thymosin beta-4. Actively researched for soft-tissue repair.
Russian heptapeptide derived from tuftsin. Anxiolytic/nootropic research.
ACTH(4-10) analog. Investigated for cognitive and neuroprotective effects.
Ala-Glu-Asp-Gly tetrapeptide. Researched for circadian and telomere biology.
Gly-His-Lys copper complex. Researched for skin repair and mitochondrial function.
✓Pros
- Public, well-documented WADA list — testable predictability
- Sanctions are 2 years for first offence, predictable and bounded
- Out-of-competition testing windows are documented; athletes can plan around them (with significant risk)
×Cons
- Catch-all language means new peptides automatically prohibited without a list update
- Cross-contamination risk in shared training / lab spaces — even unintentional exposure can trigger positive tests
- No validated performance benefit at elite level — risk-reward is one-sided
- BPC-157 named explicitly since 2022 — was the most-traded peptide pre-listing
What does WADA S0 actually mean?
It is the "non-approved substances" category on the WADA Prohibited List. The category bans any substance not currently approved by a stringent regulatory authority for human therapeutic use. Most research peptides fall under it. BPC-157 was specified by name in 2022; other peptides fall under the catch-all language.
Is BPC-157 banned for athletes?
Yes, since 2022 explicitly. Before 2022 it fell under the S0 catch-all; in 2022 WADA specified it by name. USADA has tested for BPC-157 metabolites since the listing; multiple US athletes have been sanctioned. For tested athletes, BPC-157 use is a 2-year ban for first offence.
Are TB-500, Epithalon, Selank, Semax, GHK-Cu also banned?
Yes — all fall under WADA S0 by virtue of being non-approved peptides. They are not specified by name (only BPC-157 is, as of 2026), but the catch-all language covers them. A tested athlete who tested positive for any of these peptides would be sanctioned under S0.
What about growth hormone peptides like CJC-1295?
Growth hormone secretagogues (CJC-1295, Tesamorelin in research-chemical form, Sermorelin, Ipamorelin) fall under WADA S2.5 — "Growth Hormone Releasing Factors and their analogues" — not S0. They are still prohibited; the category just differs.
How long does BPC-157 stay detectable in urine?
Published metabolite data suggests BPC-157 metabolites are detectable in urine for 3–7 days post-administration. Peak urine concentration is in the first 12–24 hours. Out-of-competition testing windows can be 24/7 for elite athletes; the practical implication is that BPC-157 use is essentially undetectable to manage around.
Does WADA prohibition apply to non-competitive use?
Only if you are subject to WADA-aligned testing — typically through a sport governing body (USADA, JADA, RUSADA, etc) that tests its athletes. Recreational lifters, hobbyist runners, and unaffiliated biohackers are not bound by WADA. They are bound by FDA / FTC commercial regulation, which is a separate framework.
What sanctions apply for an S0 positive?
First offence: 2-year ban from competitive sport. Aggravating circumstances (intent to dope, multiple substances): up to 4 years. The athlete also forfeits results, prizes, and rankings from the date of the test. Sanctions are reduced for substantial assistance to anti-doping investigations.
Where is the official WADA list?
The WADA Prohibited List 2026 is published at wada-ama.org. USADA also publishes a US-specific reference at usada.org/substances/. Both are updated annually on January 1; mid-year updates are rare but possible.