It explains: “Dietary fibre increases the weight and size of your stool and softens it. A bulky stool is easier to pass, decreasing your chance of constipation.
“If you have loose, watery stools, fibre may help to solidify the stool because it absorbs water and adds bulk to the stool.”
It adds that fibre helps maintain bowel health and helps control blood sugar levels.
The organisation says refined or processed foods — such as canned fruits and vegetables, pulp-free juices, white breads and pastas, and non-whole-grain cereals — are lower in fibre.