Extreme caution is recommended regarding supplement use. A number of positive tests have been attributed to the misuse of supplements, poor labeling or contamination of nutritional supplements.

The use of dietary supplements by athletes is a concern because in many countries the manufacturing and labeling of supplements may not follow strict rules, which may lead to a supplement containing an undeclared substance that it prohibited under anti-doping regulations. Taking a poorly labeled dietary supplement is not an adequate defense in a doping hearing.

Neither WADA or the IFF is involved in any supplement certification process and therefore do not certify or endorse manufacturers or their products. WADA and the IFF do not control the quality of the claims of the supplement industry.

In the below WADA Talks video the dietary supplements expert, Professor Ron Maughan, to discuss supplements and their associated risks.


Useful resources:

  • Informed-sport.com – A quality assurance programme for sports nutrition products, suppliers to the sports nutrition industry, and supplement manufacturing facilities.
  • Supplement Guide – A PDF guide for athletes produced by USADA


IFF wishes to warn athletes about the risk associated with supplements and has produced a video which raises the issue: