1999
DOI: 10.1001/jama.281.15.1415
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Criteria and Recommendations for Vitamin C Intake

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Cited by 483 publications
(357 citation statements)
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References 98 publications
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“…Previous reports have suggested that consuming at least ®ve daily servings of vegetables and fruits will provide more than 200 mg vitamin C per day (Johnston & Thompson, 1998;Levine et al, 1999). Although consuming this amount of vitamin C from vegetables and fruits certainly is possible, our data indicate that high-vitamin C vegetables and fruits are not consumed frequently.…”
Section: Discussionmentioning
confidence: 46%
See 1 more Smart Citation
“…Previous reports have suggested that consuming at least ®ve daily servings of vegetables and fruits will provide more than 200 mg vitamin C per day (Johnston & Thompson, 1998;Levine et al, 1999). Although consuming this amount of vitamin C from vegetables and fruits certainly is possible, our data indicate that high-vitamin C vegetables and fruits are not consumed frequently.…”
Section: Discussionmentioning
confidence: 46%
“…There is ample evidence to support a dietary recommendation that takes into consideration not only vitamin C's antiscorbutic activity but also vitamin C's role in antioxidant defense and immune function (Hemila È, 1997;Johnston & Thompson, 1998). Levine et al (1999) and Carr and Frei (1999) have recommended that the RDA for vitamin C be doubled to 120 mgaday. We showed that adults would have to consume seven daily servings of vegetables and fruits to meet this new recommendation, assuming that low-vitamin C vegetables and fruits continue to be chosen.…”
Section: Discussionmentioning
confidence: 99%
“…However, the intake of vitamin E should not be less than 3 mg for women and 4 mg for men (SINU), and this is not the case in 20% of the men and 8% of the women in cluster 1 ('small eaters'), or in 5% of the men in cluster 5 ('alcohol'). The vitamin C RDA of 60 mg for all adults (SINU) is moderately or abundantly exceeded in all dietary clusters; since there is evidence that the daily intake of vitamin C should be many times higher than the amount needed to protect against scurvy, this last recommendation is under revision (Carr & Frei, 1999;Levine et al, 1999). Furthermore, there are indications that the vitamin C requirement increases with age (Heseker & Schneider, 1994).…”
Section: Discussionmentioning
confidence: 99%
“…All photosynthetic plants have the ability to synthesize ascorbic acid (Smirnoff & Wheeler, 2000). Fruits and dark green vegetables, particularly citruses, asparagus, broccoli, and kale, are rich sources of vitamin C (Levine, Rumsey, Daruwala, Park, & Wang, 1999, p. 1417). The livers of animals that are capable of endogenous synthesis of ascorbic acid (e.g., most terrestrial vertebrates and marine mammals) are also rich in this nutrient and can be an important complementary source of vitamin C for humans in environments where vegetation is scarce (Fediuk, Hidiroglou, Madère, & Kuhnlein, 2002; Geraci & Smith, 1979).…”
Section: Vitamin C In Human Healthmentioning
confidence: 99%
“…The RDA for children aged 1–3 years is 15 mg, with incremental increases until reproductive maturity is reached (NIH, 2018). The absolute minimum daily intake necessary to prevent scurvy is thought to be 10 mg in adults (Hirschmann & Raugi, 1999: 899; Levine et al, 1999; Pimentel, 2003, p. 331; Popvich et al, 2009). If this minimum requirement is unmet long enough for somatic stores to fall below 350 mg (~1–3 months), scurvy can occur and if left untreated it is invariably fatal (Fain, 2005; NIH, 2018).…”
Section: Vitamin C In Human Healthmentioning
confidence: 99%