"I would like to make it very clear, in the strongest terms possible that I have never knowingly or deliberately ingested clenbuterol," the Saxo-Tinkoff rider, who failed the test at the Japan Cup on Oct 20, said in a statement.
"I can advise that during the period 8th-17th of October, before arriving in Japan, I was present in China for the World Tour race, Tour of Beijing.
"I understand that it has been acknowledged by the World Anti-Doping Agency (WADA) as well as other anti-doping bodies, that food contaminated with clenbuterol is a serious problem in China."
Rogers, a three-times time trial world champion, was Saxo-Tinkoff's road captain in this year's Tour de France, which he finished in 16th place overall.
"In the following weeks I will have the opportunity to explain this unfortunate situation to the UCI (International Cycling Union), in which I will give my full attention and co-operation to resolve this issue in the quickest time frame possible," Rogers added.
His team mate Alberto Contador was handed a two-year ban following a positive test for clenbuterol on the 2010 Tour de France despite arguing he was victim of food contamination.
Two years ago, the World Anti-Doping Agency (WADA) warned athletes that they should "exercise extreme caution with regards to eating meat when travelling to competitions in China and Mexico."
(Reporting by Julien Pretot; Editing by Ed Osmond)
