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Related Experiment Videos

Fibre and bowel transit times.

J S Gear, A J Brodribb, A Ware

    The British Journal of Nutrition
    |January 1, 1981
    PubMed
    Summary

    Vegetarians exhibit faster bowel transit times and less diverticular disease. Higher dietary fiber intake, over 30g/day, correlates with shorter transit times, suggesting a protective effect against constipation and diverticular disease.

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    Area of Science:

    • Gastroenterology
    • Nutritional Science
    • Digestive Health

    Background:

    • Diverticula disease prevalence differs between vegetarians and non-vegetarians.
    • Dietary fiber intake is a key factor in digestive health.
    • Bowel transit time is a significant indicator of colonic function.

    Purpose of the Study:

    • To investigate the relationship between vegetarian diets, dietary fiber intake, bowel transit time, and diverticular disease.
    • To compare bowel transit times in vegetarians versus non-vegetarians.
    • To explore the impact of dietary fiber on colonic transit and disease prevalence.

    Main Methods:

    • Comparative analysis of bowel transit times in vegetarian and non-vegetarian cohorts.
    • Assessment of total dietary fiber intake (g/day).
    • Correlation of transit times and fiber intake with the presence or absence of diverticular disease.

    Main Results:

    • Vegetarians demonstrated significantly faster bowel transit times compared to non-vegetarians.
    • Individuals consuming >30g of dietary fiber daily had transit times <75 hours.
    • A substantial percentage (38%) of subjects with <30g/day fiber intake experienced prolonged transit times (>75 hours).
    • Diverticular disease was associated with faster colonic transit times.

    Conclusions:

    • Vegetarian diets are linked to improved bowel transit and reduced diverticular disease risk.
    • Adequate dietary fiber intake (>30g/day) is crucial for maintaining healthy bowel transit times.
    • The colon's response to low-fiber diets can manifest as hyperactivity (leading to diverticular disease) or hypoactivity (leading to constipation).

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