Exposed, the truth behind the great health myths: From the five-a-day rule to eating oily fish once a week, experts reveal the common mantras that were completely made up

Most of us follow common health tips, thinking they're based on proper research. Still, a U.S. scientist has revealed that the target of 10,000 steps a day, recommended by the NHS, isn't based on science at all. Dig deeper and you'll find quite a bit of the health advice churned out by health authorities is based on flimsy science, if any. 'The overall message is that many recommendations aren't proven outright, so don't beat yourself up or feel anxious if you don't achieve them,' says Martin Caraher, a professor of food and health policy at City, University of London.