Are your jeans a little tighter after the Christmas indulgence? Some people will turn to diet books to find some weight loss advice. There is a dizzying array of literature about losing weight but is any of it actually based on good science? Leila Sattary investigates fad diets and health foods.

In 2011, we live with a more obese population than ever before and yet we know more about food and nutrition. The importance of healthy eating is right up in our consumer faces. No added sugar, with vitamins and minerals, high fibre, low fat. With all these healthy foods to choose from, why are we still getting fatter?

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