The manufacturers of Biogen‚ a supplement that markets itself as a sports brand‚ now says athletes should not use its over-the-counter sport products.This after Biogen was found to contain testosterone‚ a steroid that is banned by the World Anti-Doping Agency.The SA Institute for Drug Free Sport said on Thursday that a doping control laboratory at the University of the Free State picked up various forms of banned testosterone in the product.Biogen denied "Testoforte" had testosterone inside‚ but said it was sending samples to UK labs as a "precautionary measure". Biogen’s contamination was discovered by its ambassador‚ Angolan Demarte Pena‚ a mixed martial arts professor who was given the product for free by Biogen and who then tested positive for steroid use.In South Africa‚ even school boy rugby players are tested for such banned steroids‚ meaning using this product could land a top teen rugby player in trouble.But Biogen’s defence is that athletes are not to use their general pro...

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