Millions of people are at risk of an early death because they do not eat enough fibre, according to a major study.
A review commissioned by the World Health Organisation found that people who get plenty of fibre in their diet cut their risk of early mortality by up to a third.
They also cut their risk of a heart attack, stroke, type two diabetes or bowel cancer by up to a quarter.
Yet the vast majority of adults in Britain – around 91 per cent – eat less than the recommended daily amount. Similar figures exist in the US.