Incentives are more effective than penalties when it comes to treating obesity.
This is according to recent comments from Sue Baic, senior lecturer for the Department of Exercise, Nutrition and Health Sciences at the University of Bristol.
Ms Baic said: "It is always best to have carrot rather than stick."
She added that people should be given more information about "low-cost healthy foods, because not all healthy eating is expensive".
The comments follow research from Friends Provident, which suggested that 44 per cent of people support the introduction of a 'fat tax'.
The issue is becoming increasingly pertinent in the UK, where Datamonitor predicted that 16.5 million people will be obese by 2014.
This would equate to around one in four women in the UK being classified as obese.
Ms Baic claimed that despite the high numbers of people struggling with the issue, there is "no point" in enforcing a fat tax until there is any evidence that it would make an impact.
Independent advice on private healthcare