Not all performance-enhancing drugs are illegal, and very few of them are banned from athletics. Many types of muscle builders and vitamins are not considered illegal by sport organizations, but they all serve the same purpose. “Natural” substances are also considered legal, the most popular of these being creatine. It was estimated that in the 1996 about 80% of athletes participating in the Olympic games were taking the performance enhancing drug creatine. Creatine can be found at any GNC drug store, as well as in most gyms.
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