Coca-Cola and Pepsi contain small amounts of alcohol, research indicates

Minimum amount of alcoholic substance can be produced during the fermentation process of the refrigerant

A recent study has revealed that more than half of leading cola soft drink brands contain small traces of alcohol.

Researchers from the National Institute of Consumption (INC) in Paris claim to have found low levels of alcohol (around 10mg in every litre) in global Coca-Cola drinks, which is approximately 0.001% of alcohol per litre.

The brands tested positive for alcohol include Pepsi Cola, Coca-Cola Classic Light and Coke Zero.

In contrast, cheaper, supermarket brands of cola were alcohol-free.

The surprising results were published in the latest issue of the French magazine, 60 Million Consumers.

" It is possible that traces of alcohol come from the process' of making Coca-Cola according to its secret recipe," said Michel Pepin from Coca-Cola France, reports Channels TV.

Responding to the claims that these results will upset Muslim cola drinkers, Pepin added:

" Furthermore, the Paris Mosque has provided us with a certificate stating that our products can be consumed by the Muslim community in line with the religious opinions of the Committee of the Mosque of Paris."

A spokesperson for Pepsi told the Daily Mail that they acknowledge " soft drinks can contain minute traces of alcohol because of the ingredients used."

Responding to the findings, Tamsin Kelly, editor of parenting website, told HuffPost Lifestyle: "I would think parents would be slightly appalled by news that so many colas contain traces of alcohol all the more reason why these drinks should be a rare treat for children."