For years, Tribestan has been used by athletes of the Soviet Bloc. The Bulgarian strength athletes have also used it extensively with effectiveness. Tribestan has passed all the drug tests at every competitive level and has been used with significant results by top professional athletes as well as by recreational athletes. With its good safety profile and its natural herbal origin, Tribestan is sold as a dietary supplement in many countries with little restriction on its use. Nearly 20 years of experience with natural herbal Tribestan administration has seen no toxicity and negative effects to date.