Natural Bodybuilding Federation Rules

Introduction

Natural bodybuilding federations ban peptides, but they test differently. Some polygraph every competitor; others rely on urine and blood tests against the WADA Prohibited List. We checked each federation's site in October 2026. For the WADA rules, see the competitive sports rules overview.

Major Federation Policies

WNBF/INBF

Factor	Policy
Drug-free period	10 years for peptides
Peptide status	All synthetic peptides banned
Testing	Polygraph + urinalysis
BPC-157/TB-500	Banned; TB-500 named
Failed test	Lifetime ban

NANBF

Factor	Policy
Drug-free period	10 years (joint NANBF/WNBF policy)
Peptide status	All banned
Testing	Polygraph + urinalysis

OCB

Factor	Policy
Drug-free period	7 years for growth factors
Peptide status	Banned per WADA list
Testing	Polygraph-style screening + urinalysis
BPC-157	Named; 1-year window

INBA/PNBA

INBA/PNBA sets no fixed drug-free window. It tests urine or blood against the full WADA list and doesn't mention polygraphs.

IFPA

As of October 2026, we couldn't find a current IFPA policy, so its rules are unverified.

Specific Peptide Status

Clearly Banned

Peptide	Status	WADA 2026
All GH secretagogues	Banned	S2.2.4
IGF-1 variants	Banned	S2.3
HGH	Banned	S2.2.3
TB-500	Banned	S2.3
BPC-157	Banned	S0

Where Federation Lists Differ

OCB names BPC-157 in its 1-year class for experimental peptides, even though WADA lists it in S0. Neither WNBF nor WADA names melanotan II; as an unapproved drug it likely falls under S0 (our reading).

Polygraph Considerations

Factor	Reality
Questions asked	Use within the drug-free window
Consequences	Disqualification if failed

OCB says growth hormone isn't easily caught by standard urine panels, and a clean urine test can't overturn a failed screening.

Practical Guidance

Situation	What the rules say
Past peptide use	Wait out the window
Considering peptides	Untested divisions only
Medical need	OCB waivers cover FDA-approved drugs only

What to Watch Next

WADA's 2027 list takes effect in January 2027. OCB and INBA/PNBA follow it directly, so changes reach their athletes without a separate federation update. WNBF's 2026 list says its GLP-1 window rises to 1 year in 2027. See also how professional leagues handle peptides.