Plasma Vitamin a and Its Clinical Significance

An Estimation of Plasma Vitamin A and the Vitamin A Absorption Test

“…It is thus possible that in vitamin A deficiency not due to an absorptive defect a very low vitamin A absorption curve would result. Aron (1949) reviews suggestive evidence that there exists a mechanism which controls the level of vitamin A in the plasma, and shows that this mechanism may be upset in various disease processes. Thus it has been our experience that despite repeated experiments involving heavy dosage with vitamin A, our normal subjects maintained from day to day almost constant fasting plasma vitamin A levels.…”