If you are on a New Year diet, think again. Research increasingly supports the idea that calorie counting is oversimplistic and selfdefeating because there are many types of fat, and 90 per cent of dieters will regain any weight they lose. In addition, celebrities plugging their own diets or boasting about incredibly slim figures just weeks after giving birth, are damaging the self-esteem and even the health of women who try to copy them. The key to a successful slimming strategy, say experts, is to ignore the fad diets vying for your attention and focus instead on the type of fat you have.