Don't worry about it. I'm so cynical these days that I work off the assumption that 9/10 are doping. I'm sure PL players, and even clubs, indulge in it. I can 100% guarantee it's happening in Spain though. Operation Puerto busted a Spanish doctor as well as cycling stars (who were instantly exposed- kudos to the UCI on that), tennis stars and footballers that had been involved in a program of doping, all controlled by Dr. Fuentes.