Recently, a French magazine named “60 Million Consumers” published a research study on the ingredients of global soda brands. The conclusion of the study claimed that 19 of these soda brands contained traces of alcohol.
Coca-Cola and Pepsi were among the brands that had alcohol found in their soda. However, the traces of alcohol are quite tiny just .0001 percent per liter of soda. So there is no actual danger of anyone consuming enough soda to become drunk.
One theory put forth suggests that the alcohol comes from the natural fermenting process of various fruits that are commonly used ingredients.