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Lactose malabsorption in Australian Aborigines.

J C Brand, M S Gracey, R M Spargo

    The American Journal of Clinical Nutrition
    |March 1, 1983
    PubMed
    Summary
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    Most Australian Aborigines experience lactose malabsorption, leading to digestive issues. This indicates a widespread lactase deficiency within this population, similar to other adult human groups.

    Area of Science:

    • Gastroenterology
    • Human Biology
    • Nutritional Science

    Background:

    • Lactose malabsorption is common in many adult populations worldwide.
    • Understanding its prevalence in Australian Aborigines is crucial for health and dietary recommendations.

    Purpose of the Study:

    • To determine the incidence of lactose malabsorption in healthy, adult Australian Aborigines.
    • To compare malabsorption rates and symptoms between Aboriginal and non-Aboriginal individuals.

    Main Methods:

    • Utilized the breath hydrogen method to measure lactose malabsorption.
    • Enrolled 45 full-blood Australian Aboriginal subjects and 37 multiracial controls.
    • Assessed for symptoms such as abdominal pain and diarrhea post-lactose challenge.
    Keywords:
    AustraliaCultural BackgroundDeficiency DiseasesDemographic FactorsDiseasesEthnic GroupsHereditary DiseasesNutrition DisordersPopulationPopulation CharacteristicsResearch Report

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    Main Results:

    • 84% of Australian Aboriginal subjects exhibited lactose malabsorption.
    • 64% of Aboriginal subjects reported symptoms like abdominal pain or diarrhea.
    • 20% of control subjects showed lactose malabsorption, with all experiencing diarrhea.

    Conclusions:

    • Australian Aborigines demonstrate a high incidence of lactose malabsorption.
    • The findings strongly suggest widespread lactase deficiency in this population.
    • Results align with the common occurrence of lactase deficiency in most adult humans.