Phil B.FontanarosaMD, Interim CoeditorIndividualAuthorMargaret A.WinkerMD, Deputy EditorIndividualAuthorStephenLurieMD PhD, Fishbein FellowIndividualAuthor
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.
Levine M, Daruwala R, Wang Y, Park J, Rumsey SC. Recommendations for Vitamin C Intake—Reply. JAMA. 1999;282(22):2118-2119. doi:10-1001/pubs.JAMA-ISSN-0098-7484-282-22-jbk1208