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Vitamin D and Physical Function in Sedentary Older Men.

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Vitamin D supplementation with 4,000 IU daily did not improve physical function in older men. This study suggests that vitamin D is not effective for preventing decline in physical performance in this population.

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Area of Science:

  • Gerontology
  • Nutritional Science
  • Clinical Medicine

Background:

  • Maintaining physical function is crucial for older adults.
  • Vitamin D deficiency is common in older populations.
  • The role of vitamin D supplementation in preserving physical function remains debated.

Purpose of the Study:

  • To investigate the efficacy of vitamin D (cholecalciferol) supplementation in preventing the decline of physical function in elderly men.
  • To assess the impact of daily 4,000 IU vitamin D on physical performance metrics.

Main Methods:

  • A randomized, double-blind, placebo-controlled trial involving 130 sedentary men aged 65-90.
  • Participants received either 4,000 IU of cholecalciferol or a placebo daily for 9 months.
  • Primary outcomes measured were the Short Physical Performance Battery (SPPB) score and gait speed.

Main Results:

  • Vitamin D supplementation significantly increased serum 25-hydroxyvitamin D (25(OH)D) levels.
  • No significant improvements in SPPB scores or gait speed were observed in the cholecalciferol group compared to placebo.
  • Adverse events and fall rates did not differ between the groups.

Conclusions:

  • Daily 4,000 IU cholecalciferol supplementation effectively raised vitamin D levels in older men.
  • These elevated vitamin D levels did not translate to improvements in physical function.
  • Current evidence does not support the routine use of vitamin D supplements to prevent physical function decline in sedentary older men.