 In May 2009, food regulators from Germany discovered trace amounts of cocaine from coca leaf extracts in Red Bull Simply Cola, Pepsi One, and Diet Coke.Red Bull GmbH responded by insisting that only de-cocainised coca leaf extracts are used in the production of Red Bull Cola.The amounts in question are minute, around 0.13 micrograms of cocaine in a can of Red Bull Cola, so about 100,000 liters of the cola would need to be consumed for the cocaine to be harmful, according to Bernhard Hoffman, a food scientist for North Rhine-Westphalia who conducted the Red Bull study.