Read this first
This is plain-language harm-reduction information, not medical advice. Peptides discussed here are research compounds; most are not approved for human use. People will use them either way — we would rather they have the facts.
The World Anti-Doping Agency (WADA) approved its 2026 Prohibited List on 11 September 2025 through its Executive Committee, and it took effect on 1 January 2026. For anyone who competes in tested sport, even at amateur level, the peptide section matters.
What changed for peptides
According to the International Wheelchair Basketball Federation's summary of WADA's key updates, the 2026 list added further examples or clarifications to category S2: "Peptide hormones, growth factors, related substances and mimetics". The aim, as described, is to help athletes identify prohibited substances more easily. Other changes in the summary were unrelated to peptides: adjustments to salmeterol dosing intervals, carbon monoxide for non-diagnostic use as a prohibited method, mitochondria and ribosomes added to the genetic modification wording, and a clarification on glucocorticoid washout for sustained-release forms.
We did not open WADA's own list document, so we cannot say which individual peptides were added as named examples. Several websites list specific additions, but we have not verified those against WADA, so we leave them out.
Why this matters if you use or consider peptides
- Peptides in the S2 family (growth hormone, growth hormone secretagogues and related substances) have long been a focus of anti-doping. Check the current list directly for any substance you are considering.
- Being "not an approved medicine" does not make a peptide safe for sport, and a research chemical is not exempt just because it is unlicensed. Check the list or ask your anti-doping organisation.
- Contamination and mislabelling are a double risk for athletes: a product sold as one thing may contain another, so you cannot be sure what a test would find.
What athletes should do
WADA provides an "Athlete and ASP Guide to the 2026 List" in e-learning and PDF form, along with implementation checklists for anti-doping organisations. Athletes with a genuine medical need can apply for a Therapeutic Use Exemption (TUE) through the formal process. In the UK, UK Anti-Doping and your sport's governing body are the place to ask before starting anything.
If you are subject to testing, ask your anti-doping organisation before using any peptide. "I bought it as a research chemical" is not a defence.
What is still unknown
Exactly which substances were added as named examples in S2 for 2026, which we could not verify from a primary source. Check WADA's published list and summary of modifications for the definitive wording.
Related pages: ipamorelin, HGH and TB-500.