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December 8, 1999

Recommendations for Vitamin C Intake—Reply

Author Affiliations

Phil B.FontanarosaMD, Interim CoeditorIndividualAuthorMargaret A.WinkerMD, Deputy EditorIndividualAuthorStephenLurieMD PhD, Fishbein FellowIndividualAuthor

JAMA. 1999;282(22):2118-2119. doi:10-1001/pubs.JAMA-ISSN-0098-7484-282-22-jbk1208

In Reply: Dr Johnston is concerned that 5 servings of fruits and vegetables would provide less than 200 mg of vitamin C daily. If US Department of Agriculture and National Cancer Institute guidelines for 5 fruits and vegetables are followed, predicted vitamin C intake exceeds 215 mg/d.1 While it is possible to select fruits and vegetables with lower vitamin C content, National Cancer Institute and US Department of Agriculture guidelines recommend consumption of a variety of fruits and vegetables, and we agree wholeheartedly. If this advice is followed, average vitamin C intake will not be as low as Johnston's rather extreme example. We also indicated that vitamin C food content could be decreased by factors such as season, transport, and cooking.