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Related Experiment Videos

The aging gut. Nutritional issues

J R Saltzman1, R M Russell

  • 1Division of Digestive Disease and Nutrition, University of Massachusetts Medical Center, Worcester, Massachusetts, USA.

Gastroenterology Clinics of North America
|July 3, 1998
PubMed
Summary
This summary is machine-generated.

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As adults age, gastrointestinal changes like atrophic gastritis impact nutrient absorption, affecting micronutrient status and bone health. Further research is needed to define optimal nutritional needs for older adults.

Area of Science:

  • Gerontology
  • Gastroenterology
  • Nutritional Science

Background:

  • Aging populations necessitate understanding nutritional status in older adults.
  • Inadequate nutrition in the elderly stems from various factors including health, finances, and physiological changes.
  • This review focuses on age-related gastrointestinal alterations impacting nutritional needs.

Purpose of the Study:

  • To examine how aging affects the gastrointestinal tract and alters nutritional requirements.
  • To highlight the impact of atrophic gastritis and H. pylori infection on nutrient absorption.
  • To discuss the implications of lactose maldigestion on bone health and the need for revised nutritional recommendations.

Main Methods:

  • Review of scientific literature on aging, gastrointestinal function, and nutrition.

Related Experiment Videos

  • Analysis of the physiological changes in the stomach and small intestine with age.
  • Examination of the link between specific conditions (atrophic gastritis, lactose maldigestion) and nutrient deficiencies.

    • Main Results:

    • Atrophic gastritis, often linked to H. pylori, affects one-third of older adults, impairing gastric acid secretion.
    • Reduced gastric acid impacts absorption of iron, folate, calcium, vitamin K, and vitamin B12, potentially causing bacterial overgrowth.
    • Lactose maldigestion is common, leading to dairy avoidance and contributing to osteopenia.

    Conclusions:

    • Gastrointestinal function is remarkably preserved in aging adults due to system reserve capacity.
    • Current Recommended Dietary Allowances (RDAs) may be insufficient for older adults.
    • Future nutritional assessments should focus on functional outcomes and chronic disease prevention, not just serum levels.