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[Vitamin D and old age].

Heide Siggelkow1

  • 1Gastroenterologie und Endokrinologie, Universitätsklinik und ENDOKRINOLOGIKUM, Göttingen. heide.siggelkow@endokrinologikum.com

MMW Fortschritte Der Medizin
|July 7, 2007
PubMed
Summary
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Vitamin D3 supplementation is crucial for older adults, requiring higher serum levels (90-100 nmol/l) for benefits like improved bone density and reduced fractures. Daily intake exceeding 800 IU is recommended, especially for those in care homes.

Area of Science:

  • Gerontology and Nutritional Science
  • Endocrinology and Metabolism

Context:

  • Aging significantly impairs vitamin D3 (cholecalciferol) metabolism, affecting its absorption, synthesis, and efficacy.
  • Previous population-based normal values for vitamin D may not reflect optimal physiological levels for desired health outcomes in the elderly.
  • Elderly individuals, particularly those in residential care, are at higher risk for vitamin D deficiency.

Purpose:

  • To re-evaluate the significance of vitamin D3 serum levels in aging populations.
  • To establish evidence-based recommendations for vitamin D3 supplementation in older adults.
  • To identify target serum concentrations for achieving beneficial health effects.

Summary:

  • Optimal vitamin D3 serum levels for positive effects on bone density, neuromuscular function, and fracture reduction are identified as 90-100 nmol/l.

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  • A daily supplementation of over 800 IU of vitamin D3 is recommended, with higher doses potentially needed for individuals with initially low levels.
  • These dose-dependent effects underscore the importance of personalized vitamin D3 supplementation strategies.

    • Impact:

    • Highlights the need to adjust current vitamin D3 guidelines for the aging population.
    • Suggests that higher vitamin D3 serum levels are necessary to achieve significant health benefits in the elderly.
    • Emphasizes the potential for substantial improvements in geriatric health through targeted vitamin D3 interventions, especially in institutionalized populations.