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Related Experiment Videos

Ascorbic acid enhances hypoxic ventilatory reactivity in elderly subjects.

M Pokorski1, M Marczak

  • 1Department of Respiratory Research, Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland. pokorski@med.showa-u.ac.jp

The Journal of International Medical Research
|November 1, 2003
PubMed
Summary
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Ascorbic acid supplementation significantly boosted the hypoxic ventilatory response (HVR) in elderly women by 44%. This finding suggests potential therapeutic benefits for age-related hypoxia conditions.

Area of Science:

  • Physiology
  • Gerontology
  • Nutritional Science

Background:

  • Ascorbic acid's (Vitamin C) reducing properties suggest a role in modulating hypoxia-sensing mechanisms within the carotid body.
  • Elderly populations may exhibit diminished hypoxic reactivity and lower ascorbic acid levels, potentially impacting physiological responses to low oxygen.
  • The carotid body plays a crucial role in detecting and responding to changes in blood oxygen levels.

Purpose of the Study:

  • To investigate the impact of ascorbic acid supplementation on the hypoxic ventilatory response (HVR) in healthy elderly women.
  • To assess whether ascorbic acid can enhance the physiological response to hypoxia in a demographic prone to reduced hypoxic sensitivity.

Main Methods:

  • An open-label study involving 18 healthy females aged 60-80 years.

Related Experiment Videos

  • Ascorbic acid (1g twice daily, sustained release) was administered for 10 days.
  • Hypoxic ventilatory response (HVR) was measured using progressive eucapnic hypoxia, analyzing respiratory variables and mouth occlusion pressure against oxygen saturation.

    • Main Results:

    • Ascorbic acid supplementation led to a significant mean increase of 44% in the hypoxic ventilatory response (HVR).
    • The enhanced HVR was primarily attributed to an increase in mouth occlusion pressure, indicating improved respiratory muscle output.
    • Individual responses varied, but the overall trend showed augmented hypoxic sensitivity post-supplementation.

    Conclusions:

    • Ascorbic acid augmentation of hypoxic reactivity holds potential therapeutic value for age-related conditions characterized by hypoxia.
    • Targeted supplementation may offer a strategy to improve respiratory resilience and mitigate risks associated with hypoxia in older adults.
    • Further research is warranted to explore the clinical applications and long-term effects of ascorbic acid in managing hypoxia-related pathologies.