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Jeffrey S Hampl, PhD, RD, Christopher A. Taylor, PhD, RD and Carol S. Johnston, PhD, RD

Jeffrey S Hampl and Carol S. Johnston are with the Department of Nutrition, Arizona State University, Mesa. Christopher A. Taylor is with the Department of Nutritional Science, Oklahoma State University, Stillwater.

Correspondence: Requests for reprints should be sent to Jeffrey S Hampl, PhD, RD, Department of Nutrition, Arizona State University, 7001 E Williams Field Rd, Mesa, AZ 85212 (e-mail: Jeff.Hampl{at}asu.edu).

Objectives. We sought to determine prevalence rates of vitamin C deficiency and depletion in the United States.

Methods. We used data from the Third National Health and Nutrition Examination Survey to assess intake of dietary, supplemental, and serum vitamin C.

Results. Mean intakes and serum levels of vitamin C were normal; however, vitamin C deficiency and depletion were common (occurring among 5%–17% and 13%–23% of respondents, respectively). Smokers, those who did not use supplements, and non-Hispanic Black males had elevated risks of vitamin C deficiency, while Mexican Americans had lower risks.

Conclusions. Health professionals should recommend consumption of vegetables and fruits rich in vitamin C and should recommend supplementation for individuals at risk of vitamin C deficiency.

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