WADA prohibited peptides 2026: what’s on the list and why

The Enhanced Games kicks off in Las Vegas this week. Here is the actual WADA list everyone is talking around.

TL;DR

• WADA bans peptides in two main buckets: unapproved substances (S0) and peptide hormones / growth factors (S2).
• BPC-157, TB-500, CJC-1295, ipamorelin, sermorelin, tesamorelin, and most GLP-1 peptides are all prohibited in tested sport.
• The Enhanced Games operates outside WADA — that affects the competition rules, not US regulatory access.

What it is

WADA (in plain English: the World Anti-Doping Agency, the international body that sets the rules for tested sport) publishes an updated Prohibited List every January 1. The list groups banned substances into categories. Peptides land in two main ones: S0 — Unapproved Substances (compounds without regulatory approval anywhere in the world) and S2 — Peptide Hormones, Growth Factors, Related Substances and Mimetics. Think of S0 as a catch-all and S2 as the named list of specific peptide families.

How it works

The classification follows a simple test. If a substance is not approved by any government regulator anywhere for human use, it lands in S0 by default — BPC-157 and TB-500 sit here. If a substance signals the pituitary to release growth hormone, or is itself a growth-related peptide, it lands in S2 — CJC-1295, ipamorelin, tesamorelin, MK-677, and sermorelin all live here. GLP-1 receptor agonists like semaglutide and tirzepatide also fall under S2 per the WADA 2026 list.

Who asks about it

People ask this question when their athletic identity meets their curiosity about peptides. Masters-level runners. Adult-league hockey players. Competitive cyclists who race USA Cycling events. Anyone whose federation enforces WADA rules gets tested, in or out of competition. About 4 in 10 tested athletes will face an out-of-competition test in a given year per USADA program data.

What the research says

This is not a research question — it is a regulatory one. The list is updated annually based on a working group’s review of three criteria: performance enhancement potential, health risk, and contradicting the spirit of sport. A substance only needs to meet two of three to be added. WADA does not publish individual decision rationale per compound.

What to know before considering it

A “Therapeutic Use Exemption” (TUE) is the only way a tested athlete can legally use a prohibited substance. The TUE bar is high. Recreational use does not exempt anyone — out-of-competition testing applies year-round. Random retroactive testing of stored samples means a substance taken today could trigger a sanction years later.

The Halftime POV

We talk to people who want to feel and function better in midlife — not people chasing world records. For most readers, the WADA list is just useful context. For competitive athletes, it is the entire conversation. We default to honest: if you are tested, the answer is no, regardless of what the science suggests the molecule could do.

Related reading:

• Peptides for athletic recovery: what the evidence supports
• BPC-157 and Category 2 status
• The three-category peptide access model

Disclaimer

This article is educational and is not medical advice. Compounded medications are not FDA-approved. Clinical outcomes depend on individual factors and require physician evaluation. Results vary. Halftime Health is launching soon — join the waitlist to get updates.

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Sources

• WADA Prohibited List 2026
• USADA Athlete Advisories

This article discusses compounds that are currently under FDA Category 2 review (see our FDA categorization explainer). These compounds are not currently part of Halftime Health’s published protocol catalog. This article is provided for educational purposes only and does not constitute medical advice or an offer to sell.