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Skylab nutritional studies.

M C Smith1, P C Rambaut, C R Stadler

  • 1NASA-Johnson Space Center, Houston, Texas, USA.

Life Sciences and Space Research
|January 1, 1977
PubMed
Summary
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Skylab astronauts

Area of Science:

  • Spaceflight nutrition
  • Human physiology in microgravity
  • Nutritional biochemistry

Background:

  • Precise nutritional requirements for spaceflight are critical for astronaut health.
  • Previous space missions indicated potential physiological changes.
  • Understanding the Skylab food supply's nutritional composition was essential.

Purpose of the Study:

  • To comprehensively analyze the Skylab food supply's chemical composition.
  • To formulate menus meeting Recommended Dietary Allowances and specific nutrient intakes.
  • To assess the impact of Skylab missions on nutrient utilization and physiological changes.

Main Methods:

  • Chemical analysis of approximately 70 food items for macronutrients, micronutrients, and amino acids.
  • Menu formulation to meet established nutrient standards and constant daily intakes.

Related Experiment Videos

  • Monitoring crew adherence to programmed menus.
  • Assessing physiological parameters including digestion, taste acuity, and bone/muscle changes.

    • Main Results:

    • The Skylab food supply was thoroughly characterized for its nutritional content.
    • Astronauts generally followed their programmed menus.
    • Swallowing, digestion, and taste acuity remained unaffected by prolonged weightlessness.
    • Bone and muscle changes were more pronounced in Skylab compared to previous flights.

    Conclusions:

    • The observed bone and muscle changes were not attributed to nutritional deficits.
    • If related to nutrition, these changes suggest altered quantitative nutrient requirements in weightlessness.
    • Further research is needed to understand potential unique nutritional needs during spaceflight.