Storage and Transport of Vitamin a in Relation to Protein Intake.
نویسندگان
چکیده
Several studies have indicated a close relationship between vitamin A and protein metabolism. McLaren (1959) found that the onset of vitamin A deficiency in rats could be delayed by reducing their protein intake. Rechcigl, Berger, Loosli & Williams (1962) observed that when rats were given different levels of dietary protein for a 3-week period their total liver stores of vitamin A were inversely proportional to their protein intake, indicating that more vitamin A was utilized by the organism as the dietary protein intake was increased. Esh & Bhattacharya (1960), however, demonstrated that prolonged inadequate or suboptimal protein feeding lowers liver storage of vitamin A in rats. Friend, Heard, Platt, Stewart & Turner (1961) found reduced serum vitamin A levels in pigs when their serum protein levels fell, regardless of the animals' liver stores of the vitamin. The purpose of the experiments now described was to investigate the effect of dietary vitamin A on serum and liver proteins in rats, and to observe the effect of the sudden onset of negative nitrogen balance brought about by the withdrawal of all protein from the diet on the vitamin A status of normal and of vitamin A-deficient but still growing animals.
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عنوان ژورنال:
- The British journal of nutrition
دوره 18 شماره
صفحات -
تاریخ انتشار 1964