The OCB (Organization of Competition Bodies) is the world’s largest and most prestigious all-natural bodybuilding federation, sanctioning 130+ drug-tested natural bodybuilding events annually. OCB’s reputation for professional, well-run natural competitions that prioritize strict drug testing, ethical judging, and exceptional event productions has made it the world leader in natural bodybuilding.

All competitors are screened before competing, and all amateur and pro winners are drug tested, with lab reports provided. Combined with year-round drug testing, OCB ensures a level playing field and has earned its place as the leading all natural bodybuilding organization.