Researchers at the University of Columbia have found that cola and other fizzy drinks can make children as young as five 'violent'.
The study revealed that children who have four fizzy drinks a day are more likely to fight, destroy possessions and attack others youngsters. They were also found to be more moody and had trouble concentrating.
Around 3,000 boys and girls were polled for the study, with their mums completing questionnaires about their children's behaviour over the past two months.
The Journal of Pediatrics reports that almost half of the 3,000 boys and girls surveyed had at least one soft drink a day with one in 25 having four or more.
Researcher Shakira Suglia said that although she was not able to 'prove' that soft drinks were making the children violent, she thought that cutting down on their consumption, or stopping them all together may improve youngsters' behaviour.