WNBF - World Natural Bodybuilding Federation, 1990-

The WNBF was established as the first pro natural federation in 1990 by Cheh N. Low, publisher of New York based Natural Physique magazine (later changed to Natural Bodybuilding & Fitness). Steve Downs was chosen to serve as Chairman. The United States Natural Fitness Association (USNFA) served as an amateur affiliate in 1990. The North American Natural Bodybuilding Association (NANBA) served as an amateur affiliate in 1990 and 1991. The American Bodybuilding Coordinating Committee (ABCC) served as an amateur affiliate from 1990 through 1994. The National Gym Association (NGA) served as an amateur affiliate from 1991 through 1999. The North American Natural Bodybuilding Federation (NANBF) served as an amateur affiliate starting in 1999. Cheh Low established the International Natural Bodybuilding Federation (INBF) in 2000, and it served as an amateur affiliate starting then.

In the beginning the top three place winners in each class of Open divisions became eligible to compete in the WNBF at pro qualifiers. Special invites to compete in WNBF events were also extended early on, and eligibility was extended to any female who ever won a regional or national show to start. Starting in 1992 pro qualifying events were changed so just class winners of Open divisions qualified to compete in WNBF events. In 1998 guidelines were changed to extend eligibility to Open division overall winners only, except for special cases, which were referred to as super pro qualifiers – at which Open division class winners became eligible to compete in WNBF events.

A year-round drug-testing policy was implemented in 1993. Drug-free duration guidelines changed from five-years drug-free to seven years starting in 1994. Polygraph screenings and urine testing is utilized as the means of screening for drug use as WNBF competitions. Pro Figure was added starting in 2003.