This site is intended for healthcare professionals
Login | Register (NOW FREE)

Medical search

dietary fibre

FREE subscriptions for doctors and students... click here
You have 3 open access pages.

Dietary fibre or roughage is the elements of food which cannot be digested. It consists of:

  • celluloses
  • hemicelluloses
  • lignin
  • pectins

Poor dietary fibre consumption has been linked with the onset of a number of disease states in the 'developed' western world:

  • irritable bowel syndrome
  • chronic constipation
  • diverticular disease
  • appendicitis
  • haemorrhoids
  • hiatus hernia
  • gallstones
  • colonic carcinoma
  • atherosclerosis

The amount of fibre in the diet has a direct influence on the quantity and consistency of stool produced, and the stool transit time. In the Western world, an adult produces between 80 g and 120 g of firm stool each day with a stool transit time of about 3 days. This is in contrast with an adult in the third world, who has a diet that is similar to that of the hunter-gatherer, i.e. whole grains, cereals, legumes and nuts, supplemented by small quantities of meat and fish, who produce between 300 g and 800g of stool per day with a stool transit time of about one and a half days.

Dietary fibre also influences bile salt metabolism: an increasing amount of deoxycholate is formed from cholate.


The information provided herein should not be used for diagnosis or treatment of any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions. Copyright 2016 Oxbridge Solutions LtdĀ®. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions LtdĀ® receives funding from advertising but maintains editorial independence. GPnotebook stores small data files on your computer called cookies so that we can recognise you and provide you with the best service. If you do not want to receive cookies please do not use GPnotebook.