Why should competitors choose natural contests as the ones they compete in? Fairness for one. Why compete against others who could have an advantage from using anabolic steroids when you don't have to? Think it doesn't matter for bikini competitors? It's not always about muscle. Approximately half the people who don't pass a polygraph screening at natural contests are bikini competitors. Remember, anabolic steroids aren't the only things that can make competition unfair. Clenbuterol and Anavar are the popular banned substances with women. They make losing body fat easier.