"About a quarter of adults in the UK are now obese.
Obesity and problems caused by being overweight are thought to cost the NHS more than £3bn a year.
The Scottish government said 40% of Scots could be classed as obese by 2030, if things do not change."
Professor Alan Maryon-Davis, president of the Faculty of Public Health says:
More low fat diet advice, Professor Maryon-Davis? Same advice, different result?
"We have to take obesity seriously."