Obesity levels could be rising due to the fact that many people still fail to distinguish between foods which are healthy and those that are not.
A new survey from the World Cancer Research Fund (WCRF) found that many people in the UK cannot identify which foods have high calorie contents, despite nutritional information often being displayed on the products.
"If people are unaware which foods contain lots of calories then it makes it even more difficult to adopt a diet that can help maintain a healthy weight," said Maya Monteiro, senior education manager at WCRF.
The organisation explained that it was a problem because obesity is a contributing factor to many illnesses such as some forms of cancer, diabetes and heart disease.
According to Andreas Ullrich, medical officer for cancer control at the World Health Organization, global incidences of cancer could rise to 21.4 million a year by 2030 if current trends continue.