Olympic athletes must “exercise extreme caution” as they eat Chinese meat, which can be contaminated with the prohibited substance clenbuterol, the World Anti-Doping Agency (WADA) warned last week. A WADA spokesperson said its guidelines for traveling athletes to “only to eat at places given the all-clear by event organizers” in countries such as China remained in place, Olympic news website Inside the Games reported. It came after the German Anti-Doping Agency alerted its athletes to avoid Chinese meat at all cost and to seek an alternative over possible clenbuterol contamination. Concerns over contaminated Chinese meat have existed for decades, although China banned farmers in 1997 from using clenbuterol, also known as “lean meat powder,” to feed livestock such as swine and calves. The illegal food additive was designed to produce leaner meat by speeding up muscle-building and the burning of fat. Competitors of the upcoming Games are unlikely to have …