Regulatory · Glossary
WADA Prohibited List peptides
Also written: WADA Prohibited List · WADA List · Prohibited List
Definition
The WADA Prohibited List names substances banned in sport; peptide hormones and GH secretagogues sit in class S2.
WADA prohibited list peptides are peptide hormones, growth factors, releasing factors, mimetics, and related substances banned under anti-doping rules, mainly in class S2. The 2026 list applies all year, not only during competition, and its examples are not exhaustive: an absent name is not a green light.
What is the Prohibited List?
The Prohibited List is the World Anti-Doping Agency’s annually updated rulebook for substances and methods banned in sport. The 2026 WADA list took effect on January 1, 2026. “Prohibited at all times” means both in and out of competition; S2 carries that label.
The list answers a sports-rule question, not whether a substance is FDA-approved, legal to possess, safe, or effective. Those are separate questions covered in the regulatory status reference.
What does WADA S2 cover?
WADA S2 covers peptide hormones, growth factors, related substances, and mimetics—compounds that copy or alter the same biological signals. S2.2 covers peptide hormones and their releasing factors. S2.2.4 specifically includes growth hormone secretagogues, GH-releasing peptides (GHRPs), and GHRH analogues.
Concrete examples make the alphabet soup useful. CJC-1295 is named as a GHRH analogue, while ipamorelin appears as a growth hormone secretagogue. Thymosin-β4 and derivatives such as TB-500 are also prohibited in sport, but WADA places them in S2.3, the growth-factor section—not S2.2. The growth-hormone peptide hub explains the families.
Does “not listed” mean allowed?
No. The list uses examples plus catch-all wording for substances with a similar chemical structure or biological effect. USADA’s 2026 advisory says plainly that the list is not exhaustive. An unapproved anti-doping peptide may also fall under S0 when no later class addresses it.
That is why checking only a familiar product name can fail. “Not named” and “permitted” are different boxes. A current ingredient-level check matters more than an old screenshot.
Is prohibited in sport the same as illegal?
No. A WADA or USADA peptide ban governs eligibility under anti-doping rules; it is not a criminal statute or an FDA approval decision. A prescription medicine can be prohibited in sport, while an unapproved substance can raise a different set of U.S. regulatory questions.
The evidence belongs in separate lanes too: WADA establishes rule status, not proof that a peptide improves performance. A peer-reviewed review of synthetic peptides in doping control explains why short half-lives and natural look-alikes complicate detection. Our guide to whether peptides show up on drug tests covers that distinction.