The effects of dietary fibre on upper and lower gastro-intestinal transit times and faecal bulking.
A total of 10 obese patients (body mass index greater than 25) undergoing treatment with a very low-calorie (330 kcal/day) liquid diet were treated without and with 10.5 or 21 g/day dietary fibre. Mean (+/- SE) faecal bulking increased significantly (P less than 0.001) in a dose-dependent manner from 314.8 +/- 54.4 g on a fibre-free diet to 517.2 +/- 45.4 g and 748.9 +/- 78.5 g, respectively, over 5 days on diets containing 10.5 and 21 g/day dietary fibre. Total mean colonic transit time decreased from 53.9 +/- 3.6 h on a fibre-free diet to 25.8 +/- 44 and 17.3 +/- 4.6 h, respectively, on diets including 10.5 and 21 g/day dietary fibre. Both right and left colonic transit times were similarly affected but no effect on orocaecal transit time was detected.
Staniforth
D H
DH
West Middlesex University Hospital, Isleworth, UK.
Baird
I M
IM
Fowler
J
J
Lister
R E
RE
D015992:Body Mass Index; D003106:Colon / Q000503:physiopathology; D004038:Diet, Reducing; D004043:Dietary Fiber; D002149:Energy Intake; D005243:Feces; D005260:Female; D005772:Gastrointestinal Transit; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology*