Cited by 111Vitamin C and Antioxidants ResearchAntioxidant Activity and Oxidative StressTrace Elements in Health

Assessment of human vitamin C status

Jacob, Robert A.·1990·The Journal of Nutrition

Abstract

Since no reliable functional markers of human vitamin C status have been demonstrated, determination of vitamin C levels in blood plasma and/or leukocytes remains the current choice for individual and population assessments. Newer analytical techniques, especially high-performance liquid chromatography, allow determination of reduced (ascorbic acid), oxidized (dehydroascorbic acid), or total amounts of vitamin C in biological specimens or foods. Plasma levels of vitamin C forms are easily determined but may not reflect tissue content as well as leukocyte levels. The vitamin C content of leukocyte cell types varies severalfold and, unlike plasma, leukocytes may contain an appreciable fraction of dehydroascorbic acid. The effects of sex, age, cigarette smoking, drugs, and physiological factors on vitamin C levels are better known for plasma than leukocytes. To realize the potential of leukocytes as measures of vitamin C status, continued work is needed in standardizing the methodology and interpretive guidelines and simplifying the technique for blood processing. The search for specific functional markers of vitamin C deficiency should continue. Candidate markers may involve pathways of carnitine or collagen metabolism, immunocompetence, or antioxidant defense.

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Crossref · 10.1093/jn/120.suppl_11.1480

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Authors
Jacob, R. A.
Affiliations
United States Department of Agriculture (US)
Corresponding author
Jacob, Robert A.
Venue
The Journal of Nutrition
Publisher
Elsevier BV
Published
1990-11
Volume
120
Pages
1480-1485
ISSN
0022-3166 (ISSN-L)
OpenAlex
W1851396728
Cited by
111
References
20
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 6 · 2022: 3 · 2021: 3 · 2020: 5 · 2019: 2 · 2018: 5 · 2017: 3 · 2016: 4 · 2015: 2 · 2014: 6 · 2013: 6 · 2012: 6
FWCI
1.45
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
Keywords
vitamin C status, vitamin C, dehydroascorbic acid, plasma vitamin C, HPLC, cigarette smoking, antioxidant defense, collagen metabolism, carnitine metabolism, immunocompetence
MeSH terms
Ascorbic Acid, Humans, Leukocytes, Nutritional Status, Nutrition Assessment

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