Researchers in the United States said on Tuesday they had found a “shocking” association — if only a statistical one — between violence by teenagers and the amount of soda they drank.

High-school students in inner-city Boston who consumed more than five cans of non-diet, fizzy soft drinks every week were between nine and 15-percent likelier to engage in an aggressive act compared with counterparts who drank less.

“What we found was that there was a strong relationship between how many soft drinks that these inner-city kids consumed and how violent they were, not only in violence against peers but also violence in dating relationships, against siblings,” said David Hemenway, a professor at the Harvard School of Public Health.

“It was shocking to us when we saw how clear the relationship was,” he told AFP in an interview.

Teen violence linked to heavy soda diet: study