STUDY ON THE ASCORBIC ACID REQUIREMENT OF CHINESE ADULTS / 营养学报

ABSTRACT

0.05) The above amount was enough to maintain the subjects two weeks in good vitamin C nutrition as judged by steady plasma ascorbic acid content of about 1 mg%. At the end of maintenance period, 400mg of ascorbic acid was administered. The urinary excretion of ascorbic acid in 24 hours was about 30% of the test dose.This method is reliable but not suitable for large scale analysis as it involves daily urine collection and analysis.The urinary excretion of ascorbic acid decreased during menstrual period in women subjects.