IOC consensus statement: dietary supplements and the high-performance athlete

The IOC's statement on supplements starts from the view that nutrition makes a small but valuable contribution to elite performance, and supplements a minor one within it, even though supplement use is widespread at every level of sport.

It groups supplements by purpose: correcting micronutrient deficiencies, convenient energy and macronutrients, direct performance benefits and indirect benefits such as supporting heavy training. Only a few performance supplements, including caffeine, creatine, certain buffering agents and nitrate, have good evidence, and responses vary between individuals. A full nutrition assessment should come first, performance supplements should be tried in training before competition, and athletes face a real risk of failing a drug test from contaminated products.

Summarized from the published abstract; the full text was not open to us.