Erythropoietin, called EPO, is banned from sports because of claims it can enhance an athlete’s performance unfairly.

A systematic review couldn’t find any benefit but it found considerable risk of harm.

Professional cycling remains a popular sport though its image has been tainted by high-profile doping cases. EPO, a blood-cell stimulating hormone, recently made headlines, when the self-appointed United States of America’s Anti-Doping agency (USADA) claiming that it was used by record seven-time Tour de France winner Lance Armstrong. 

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