nutritionist Javier Fernández Ligero explains why having an orange juice for breakfast is not as healthy as we think. Says that the fiber stays almost entirely in the remains of the pulp while the fructose content, the fruit's natural sugar, remains intact.

Not even the classic (and delicious) toast with tomato, oil and ham (unless the bread is wholemeal) is as 'healthy' as people think, he says. "Dinner has to be complete enough to keep us satiated throughout the night," he says, adding that a little fresh cheese or a little skimmed yogurt will not help.