A new computerised device has proved more effective than regular methods for treating obesity.
The Mandometer device, developed by the Karolinska Institute in Stockholm, monitors a person's portion size and the speed at which they consume food in an effort to control their eating.
A study by the University of Bristol, led by Professor Julian Hamilton-Shield, looked at a group of 106 obese nine to 17 year olds.
Half of the group was treated with the Mandometer while the other half was provided with standard obesity care.
After 12 months, the Mandometer group showed a significantly lower body mass index as well as a smaller portion size and a reduction in eating speed of 11 per cent, compared with a four per cent gain in the other group.
The authors of the study, published in the British Medical Journal, said: "Mandometer therapy, focussing on eating speed and meal size, seems to be a useful addition to the rather sparse options available for treating adolescent obesity effectively without recourse to pharmacotherapy."