The United States Anti-Doping Agency announced on Tuesday that UFC athlete Ning Guangyou , of China, has tested positive for a prohibited substance, which was determined to have been ingested by him without fault or negligence. Guangyou, 34, tested positive for trace amounts of clenbuterol as the result of an out-of-competition urine sample he provided on May 19, 2016. Clenbuterol is an Anabolic Agent prohibited at all times under the UFC Anti-Doping Policy, which has adopted the World Anti-Doping Agency (WADA) Prohibited List. Consistent with numerous prior reported cases globally, the issue of illicit administration of clenbuterol to animals destined for food production can result in, under specific conditions, a positive sample from an athlete. WADA has issued specific warnings about this problem in China and Mexico. To USADA’s knowledge, due to strict regulatory and meat certification practices, a clenbuterol positive athlete sample has never been reported after consumption of meat produced in the U.S.
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USADA Clears UFC’s Ning Guangyou; Banned Substance Likely from Contaminated Meat – MMA Weekly