Healthcare leaders have called for investment in school health and nutrition education programmes.
At the British Medical Association (BMA) annual conference, doctors said a "simple, practical and understandable' health education programme could reduce obesity in children.
Delegates at the event also called on schools to introduce lessons on safe and effective use of health services.
Aberdeen-based doctor Sally Winning, deputy chairman of the BMA in Scotland said: “Today we are talking about our children, our future and the future providers and users of our health service. Their health and wellbeing and the judicious use of our health service matters.
“Over four decades of education, health education messages in schools have changed little."
Baroness Sheila Hollins, chair of the BMA’s Board of Science supported the motion, saying that it was a “useful guide to the BMA’s current work to promote healthy diets in children.”
Between 1995 and 2012 in Scotland, the proportion of people aged 16 to 64 who were overweight or obese increased from 52.4% to 61.9%. And 16.8% of children were at risk of obesity.