Athletes competing at the upcoming 2022 Winter Olympic and Paralympic Games in Beijing have been told to "exercise extreme caution" when eating meat in China amid fears it could be contaminated with banned substances.

A change to the World Anti-Doping Code relating to clenbuterol may cut the number of anti-doping rule violations (ADRVs) attributed to the steroid, which has long posed problems for testers owing to its presence in meat liable to be consumed by athletes living in, or visiting, various countries.

Olympic race walk silver medallist Maria Guadalupe González of Mexico has become the latest athlete to blame a positive drugs test on contaminated meat.

The World Anti-Doping Agency (WADA) concede that they currently have no scientific means to distinguish whether failed drug tests for clenbuterol have resulted from contaminated meat or genuine doping.

China has been rocked by a second speed skating doping controversy in a month after Shi Xiaoxuan was removed from their squad for next month's Winter Olympic Games in Pyeongchang due to a failed drugs test for clenbuterol.

An initial feedback stage to begin a three-year process for devising the 2021 World Anti-Doping Code has been launched.

Polish canoeist Adam Seroczyński has told German television channel ARD that he is considering legal action against the International Olympic Committee (IOC) after his failed drugs test at the Beijing 2008 Games.

American distance runner Fernando Cabada has become the latest athlete to be cleared of a clenbuterol doping offence after claiming to have consumed contaminated meat.

Lucas Browne has been stripped of his World Boxing Association (WBA) heavyweight title after both his "A" and "B" samples tested positive for banned substance clenbuterol.