You follow the rules: you eat your greens, you skip the junk. So why is that waistband a little snuggerthan you'd like? It may not be what's on your plate, but how much.
For when it comes to portion size, it seems we've lost all sense of, well, proportion.'Most people don't know what an appropriate portion should look like,' says Sian Porter, a consultant dietitian and spokesperson for the British Dietetic Association.
'But even healthy food contains calories. You can make really healthy choices and still eat too much.'
Good Health has the answer at hand - literally.
'The obvious advantage of using your hands is that you always have them with you,' says Sian Porter.