Scientists now know exactly why fibre is good for you

New York

A DIET of fibre-rich foods, such as fruits and vegetables, reduces the risk of developing diabetes, heart disease and arthritis. Indeed, the evidence for fibre's benefits extends beyond any particular ailment: People who eat more of it simply have lower odds of dying.

That's why experts are always saying how good dietary fibre is for us. But while the benefits are clear, it's not so clear - why - fibre is so great.