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Creatine works to build up perfromance in activities involving repeated sprints (e.g. rugby as played by backs or back row forwards). Dose up on a daily basis for the week prior to the competition. It may knock 5% off your sprint times. Good evidence that it works (but remember in these activities, skill and reaction times matter much more than sprint times). There is no evidence that whey (or other protein) drinks work (normal diet is adequate in protein; athletes in training consume more food and thus more protein). The one situation where they may be useful is in those bodybuilders who sometimes show remarkably (suspiciously) fast muscle growth, at a rate above normal dietary protein intake. In general, though, creatine is the only dietary supplement of proven efficacy. Matt Dunn Warwick