Healthcare providers Kaiser Permanente looked at 510,000 children aged 10-19.
It found those who were overweight were twice as likely as those with a healthy weight to have gallstones - the rate was higher among those who were obese.
Those who were moderately obese were four times more likely to have gallstones than those with a normal body mass index, and this rose to six times for those classed as extremely obese.
National Obesity Forum chairman Prof David Haslam said the fact gallstones were being seen in obese teenagers was not surprising - but that it was worrying.
"We know there is a link between the condition and obesity. But yet again we are seeing an adult illness in young people - because of obesity.
"We have already seen Type 2 diabetes, high blood pressure and high cholesterol. Now it's gallstones.”
With thanks to www.bbc.co.uk
To read the full story go to:
http://www.bbc.co.uk/news/health-19367278
