Cited by 111Vitamin C and Antioxidants ResearchAntioxidant Activity and Oxidative StressPhytochemicals and Antioxidant Activities

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Myths, Artifacts, and Fatal Flaws: Identifying Limitations and Opportunities in Vitamin C Research

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Michels, Alexander, Frei, Balz·2013·Nutrients

DOI 10.3390/nu5125161PMC PMC3875932

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Abstract

Research progress to understand the role of vitamin C (ascorbic acid) in human health has been slow in coming. This is predominantly the result of several flawed approaches to study design, often lacking a full appreciation of the redox chemistry and biology of ascorbic acid. In this review, we summarize our knowledge surrounding the limitations of common approaches used in vitamin C research. In human cell culture, the primary issues are the high oxygen environment, presence of redox-active transition metal ions in culture media, and the use of immortalized cell lines grown in the absence of supplemental ascorbic acid. Studies in animal models are also limited due to the presence of endogenous ascorbic acid synthesis. Despite the use of genetically altered rodent strains lacking synthesis capacity, there are additional concerns that these models do not adequately recapitulate the effects of vitamin C deprivation and supplementation observed in humans. Lastly, several flaws in study design endemic to randomized controlled trials and other human studies greatly limit their conclusions and impact. There also is anecdotal evidence of positive and negative health effects of vitamin C that are widely accepted but have not been substantiated. Only with careful attention to study design and experimental detail can we further our understanding of the possible roles of vitamin C in promoting human health and preventing or treating disease.

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Authors: Michels, A., & Frei, B.
Affiliations: Oregon State University (US)
Corresponding author: Michels, Alexander
ORCID: Michels, Alexander
Venue: Nutrients
Publisher: MDPI AG
Published: 2013-12-16
Volume: 5
Issue: 12
Pages: 5161-5192
ISSN: 2072-6643 (ISSN-L)
DOI: 10.3390/nu5125161
PMC: PMC3875932
OpenAlex: W2076921574
Cited by: 111
References: 139
Citations by year: 2026: 7 · 2025: 8 · 2024: 10 · 2023: 9 · 2022: 3 · 2021: 13 · 2020: 8 · 2019: 11 · 2018: 8 · 2017: 9 · 2016: 12 · 2015: 7 · 2014: 6
FWCI: 0.94
Type: journal article
Language: en
Open access: gold
doi.org
Licence: cc-by
creativecommons.org/licenses/by/3.0/ (vor)
Locations: Nutrients (publishedVersion, cc-by)
PubMed Central (publishedVersion, cc-by)
PubMed (publishedVersion)
DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics: Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
Health Sciences › Medicine › Biochemistry (medical) › Antioxidant Activity and Oxidative Stress
Health Sciences › Medicine › Biochemistry (medical) › Phytochemicals and Antioxidant Activities
Keywords: vitamin C, redox chemistry, transition metal ions, immortalized cell lines, ascorbic acid biosynthesis, vitamin C supplementation, randomized controlled trials
MeSH terms: Animals, Ascorbic Acid, Ascorbic Acid Deficiency, Disease Models, Animal, Humans, Randomized Controlled Trials as Topic, Dietary Supplements

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Myths, Artifacts, and Fatal Flaws: Identifying Limitations and Opportunities in Vitamin C Research

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