Coca-Cola and Pepsi contain minute traces of alcohol, scientific research published in France has revealed. The revelation will cause concern among those who chose the carbonated soft drink for religious, health or safety reasons. According to tests carried out by the Paris-based National Institute of Consumption (INC) more than half of leading colas contain the traces of alcohol. Can't beat the real thing: The revelation will cause concern among those who chose the carbonated soft drink for religious, health or safety reasons These include the brand leaders Coca-Cola and Pepsi Cola, while it is mainly only cheap supermarket versions of the drink which are alcohol-free. ‘60 Million Consumers’, the French magazine, publishes the results of the tests in its latest issue. They suggest that the alcohol levels are as low as 10mg in every litre, and this works out at around 0.001 per cent alcohol.