Healthy vs unhealthy food: the challenges of understanding food choices

We know a lot about food but little about the food choices that affect the nation's health. Researchers have begun to devise experiments to find out why we choose a chocolate bar over an apple - and whether 'swaps' and 'nudges' are effective. Perceiving food as tasty is important. It's not good enough simply to tell people what is healthy if they don't think those foods are also tasty. Suzanna Forwood The solution to the obesity epidemic is simple: eat less, move more. But take a deep breath before you type these four words into a search engine. The results exceed 9 million.