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VITAMIN ARetinol or vitamin A is probably the best example of a nutrient influenced by disease.It is well accepted that the circulating concentration of retinol is not related to dietary intake, except when the amount in the blood is low (approximately < 0.7 pmol/l; Olson, 1984).Nevertheless, it appears that at all concentrations the amount in the blood is influenced by diseases.We first realized this when studying patients with malaria from two different https://doi.org/10.
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David I. Thurnham (1997) studied this question.
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