Dietary supplements – are they fit for purpose?

Can all those drinks, capsules and powders really improve your sporting performance? We asked the expertsThere are hundreds of powders, gels and bars that promise to improve an athlete’s performance. But judging which ones are based on good scientific evidence and which might be useful for a particular activity or individual is a bewildering business.Even the fact that professional sports teams use particular products might not be an indicator of their effectiveness – they may merely