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A new recommended dietary allowance of vitamin C for healthy young women
Open accessAbstract
The recently released Recommended Dietary Allowance of vitamin C for women, 75 mg daily, was based on data for men. We now report results of a depletion-repletion study with healthy young women hospitalized for 186 +/- 28 days, using vitamin C doses of 30-2,500 mg daily. The relationship between dose and steady-state plasma concentration was sigmoidal. Only doses above 100 mg were beyond the linear portion of the curve. Plasma and circulating cells saturated at 400 mg daily, with urinary elimination of higher doses. Biomarkers of endogenous oxidant stress, plasma and urine F(2)-isoprostanes, and urine levels of a major metabolite of F(2)-isoprostanes were unchanged by vitamin C at all doses, suggesting this vitamin does not alter endogenous lipid peroxidation in healthy young women. By using Food and Nutrition Board guidelines, the data indicate that the Recommended Dietary Allowance for young women should be increased to 90 mg daily.
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“Multiple studies showed no effect of vitamin C on markers of lipid peroxidation in healthy humans or animals [63,66,166].”
From Vitamin C-Sources, Physiological Role, Kinetics, Deficiency, Use, Toxicity, and Determination (2021) · cites this paper as [66]
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“The plasma levels increase to this plateau concentration up to doses of about 200–400 mg daily. Higher doses increase plasma levels only minimally [55,65,66].”
From Vitamin C-Sources, Physiological Role, Kinetics, Deficiency, Use, Toxicity, and Determination (2021) · cites this paper as [66]
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“This was not confirmed in women where the saturable doses were 200–400 mg daily, matching with doses producing maximal steady-state plasma levels [66].”
From Vitamin C-Sources, Physiological Role, Kinetics, Deficiency, Use, Toxicity, and Determination (2021) · cites this paper as [66]
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Metadata
- Authors
- Levine, M., Wang, Y., Padayatty, S. J., & Morrow, J.
- Affiliations
- National Institutes of Health (US)
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2001-08-14
- Volume
- 98
- Issue
- 17
- Pages
- 9842-9846
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC55540
- OpenAlex
- W2070532527
- Cited by
- 496
- References
- 27
- Citations by year
- 2026: 5 · 2025: 16 · 2024: 12 · 2023: 21 · 2022: 30 · 2021: 34 · 2020: 38 · 2019: 17 · 2018: 17 · 2017: 17 · 2016: 11 · 2015: 17 · 2014: 19 · 2013: 27 · 2012: 25
- FWCI
- 19.48
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (DK 48831, DK 26657, GM 15431, CA 77839)
- National Cancer Institute (CA77839, P01CA077839)
- National Institute of General Medical Sciences (GM 15431, P50GM015431, P01GM015431)
- National Institute of Diabetes and Digestive and Kidney Diseases (Z01DK054506, DK-26657, DK 48831, P30DK026657, R01DK048831)
- NIH Clinical Center
- 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, RDA, young women, dose-response relationship, steady-state plasma concentration, urinary excretion, F2-isoprostanes, lipid peroxidation, oxidative stress
- MeSH terms
- Adult, Ascorbic Acid, Biological Availability, Canada, Chromatography, High Pressure Liquid, Dose-Response Relationship, Drug, Female, Humans, Nutritional Requirements, Sex Characteristics, United States, Lipid Peroxidation, Dinoprost, Oxidative Stress, Nutrition Policy, F2-Isoprostanes
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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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