In the sport of Natural Bodybuilding, the classification of natural is based on the organization you are competing in. For example, The I.N.B.A. (International Natural Bodybuilding Association) is the largest and most strict drug-free bodybuilding and fitness organization in the world. The INBA follows the I.O.C. (International Olympics Committee) and W.A.D.A. (World Anti-Doping Association) Banned Substance Lists. All Athletes are fully tested by urinalysis, even amateur level. On the other end of the spectrum, you have the N.P.C. (National Physique Committee) which only tests for Anabolic steroids, Pro- hormone and prescripted Diuretics, and testing is different depending on the competition you are competing in. There are many organization for Natural Bodybuilding including the INBA, INBF (International Natural Bodybuilding Federation) , NGA (National Gym Association), NANBF (North American Natural Bodybuilding Federation),NPC, NPA (Natural physique association), and OCB (Organization of Competitive Bodybuilders). All of which has their own “Banned Substances” and testing methods. These methods range from polygraph, to Urinalysis, in some cases like the Olympics, there is even blood testing.