Cited by 316Spaceflight effects on biologySpace Exploration and TechnologySpace exploration and regulation

The DOI matches its Crossref record; 47 of the 51 references it cites were found in a registry or an index.

The Nutritional Status of Astronauts Is Altered after Long-Term Space Flight Aboard the International Space Station

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Abstract

Defining optimal nutrient requirements is critical for ensuring crew health during long-duration space exploration missions. Data pertaining to such nutrient requirements are extremely limited. The primary goal of this study was to better understand nutritional changes that occur during long-duration space flight. We examined body composition, bone metabolism, hematology, general blood chemistry, and blood levels of selected vitamins and minerals in 11 astronauts before and after long-duration (128-195 d) space flight aboard the International Space Station. Dietary intake and limited biochemical measures were assessed during flight. Crew members consumed a mean of 80% of their recommended energy intake, and on landing day their body weight was less (P = 0.051) than before flight. Hematocrit, serum iron, ferritin saturation, and transferrin were decreased and serum ferritin was increased after flight (P < 0.05). The finding that other acute-phase proteins were unchanged after flight suggests that the changes in iron metabolism are not likely to be solely a result of an inflammatory response. Urinary 8-hydroxy-2'-deoxyguanosine concentration was greater and RBC superoxide dismutase was less after flight (P < 0.05), indicating increased oxidative damage. Despite vitamin D supplement use during flight, serum 25-hydroxycholecalciferol was decreased after flight (P < 0.01). Bone resorption was increased after flight, as indicated by several markers. Bone formation, assessed by several markers, did not consistently rise 1 d after landing. These data provide evidence that bone loss, compromised vitamin D status, and oxidative damage are among critical nutritional concerns for long-duration space travelers.

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Metadata

Authors
Smith, S. M., Zwart, S. R., Block, G., Rice, B. L., & Davis-Street, J. E.
Affiliations
  • National Aeronautics and Space Administration (US)
  • University of California, Berkeley (US)
Corresponding author
Smith, Scott M.
Venue
The Journal of Nutrition
Publisher
Elsevier BV
Published
2005-03
Volume
135
Issue
3
Pages
437-443
ISSN
0022-3166 (ISSN-L)
OpenAlex
W1891721997
Cited by
316
References
51
Citations by year
2026: 14 · 2025: 26 · 2024: 19 · 2023: 19 · 2022: 23 · 2021: 19 · 2020: 20 · 2019: 17 · 2018: 10 · 2017: 13 · 2016: 13 · 2015: 10 · 2014: 18 · 2013: 15 · 2012: 15
FWCI
7.34
Type
journal article
Language
en
Open access
Locations
  • Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Funders
Johnson Space Center
Topics
  • Health Sciences › Medicine › Physiology (medical) › Spaceflight effects on biology
  • Physical Sciences › Engineering › Aerospace Engineering › Space Exploration and Technology
  • Social Sciences › Political Science and International Relations › Space exploration and regulation
Keywords
astronaut nutrition, long-duration spaceflight, International Space Station, body composition, bone metabolism, bone resorption, bone formation markers, iron metabolism, serum ferritin, hematocrit, acute phase proteins, oxidative stress, 8-hydroxy-2'-deoxyguanosine, superoxide dismutase, vitamin D status, 25-hydroxyvitamin D3, vitamin D supplementation, energy intake, weight loss
MeSH terms
8-Hydroxy-2'-Deoxyguanosine, Acute-Phase Proteins, Adult, Body Composition, Calcifediol, Energy Intake, Deoxyguanosine, Erythrocytes, Female, Humans, International Cooperation, Male, Middle Aged, Nutritional Status, Space Flight, Superoxide Dismutase, Time Factors, Vitamin D, Biomarkers, Oxidative Stress, Astronauts, Dietary Supplements

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