High fibre diets are associated with trimmer waistlines - one theory is that fibre fills you up, while another is that some types can be partially digested by friendly gut bacteria, which in turn release chemicals that influence appetite.
To get the recommended 25g of fibre can mean eating five portions of fruit and vegetables a day, plus two slices of wholemeal bread and a portion each of high fibre breakfast cereal and wholewheat pasta.
To take it to 30g, you'd need to add a large jacket potato.
That can be a daunting menu, so instead here are smart ways to sneak in more fibre - you'll need to choose between three and six items from the list below to get the recommended daily intake of at least 25g (and ideally 30g).