Natural bodybuilding

Natural bodybuilding is a discipline of resistance training and competitive physique sport in which athletes pursue muscular development, conditioning, and symmetry without the use of anabolic-androgenic steroids, prohormones, or other substances on the prohibited lists of tested federations. The defining feature is not legality but voluntary submission to a tested standard: athletes agree to polygraph and urine screens administered by their sanctioning body, and a positive result revokes both the title and the “natty” designation.

History

The natural bodybuilding movement emerged in the 1980s as a reaction to the unregulated steroid use widespread in mainstream bodybuilding competitions. The earliest tested federations, including the WNBF (founded 1989) and the INBF, adopted lifetime drug-free standards under which a single past use of a banned substance disqualifies an athlete permanently.

Banned-substance standards

Each federation publishes its own banned list, but most align with the WADA prohibited list. Typical bans include anabolic steroids, growth hormone, insulin (for performance use), SARMs, and most peptide secretagogues. Permitted substances vary: caffeine, creatine, and most over-the-counter sports supplements are universally allowed.

The peptide question

Peptides occupy a contested middle ground. Therapeutic use of healing peptides such as BPC-157 for documented injury is treated leniently by some federations and as a violation by others. Growth-hormone-axis peptides (GHRH analogues and growth hormone secretagogues) are uniformly prohibited.

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