Natural bodybuilding is a bodybuilding movement with various competitions that take place for bodybuilders who do not use performance-enhancing drugs. This includes anabolic steroids, insulin, diuretics and human growth hormone. If a bodybuilder meets the requirements of the sanctioning body (the recognized group or authority that sanctions and validates competitions) that they are competing in, then they are considered to be "natural". There are numerous sanctioning bodies who provide their own rules and regulations that govern the competition procedures, event qualifications, banned substance lists, and drug testing methods.
Natural Bodybuilding has many organizations with competitions where one can earn the rank of a natural professional bodybuilder. Professional natural bodybuilding organizations include the PNBA (Professional Natural Bodybuilding Association), professional affiliate of the INBA, IFPA (International Fitness and Physique Association), professional affiliate to the OCB and NANBF, WNBF (World Natural Bodybuilding Federation), professional affiliate to the INBF, Musclemania, Ultimate Fitness Events (UFE) and NGA, professional affiliates to their counterpart amateur organizations of the same name.