Effect of ascorbic acid on plasma cholesterol in humans in a long-term experiment.
During the period of a low vitamin C intake (approximately equal to 20 mg per day) ascorbic acid in a dose of 2 x 500 mg per day was administered to 82 men and women aged 50-75 years. A correlation of plasma cholesterol levels determined before and after a three months' administration of ascorbic acid showed the effect of vitamin C to be dependent on the starting concentration of plasma cholesterol: the higher the initial cholesterolemia, the greater the hypocholesterolemic effect of ascorbic acid. On restricting the experimental group to subjects with an initial cholesterolemia above 230 mg%, the effect of the same dose of ascorbic acid on cholesterolemia was followed in three-month periods for a further 9 months. In all these time intervals, ascorbic acid was found significantly to depress cholesterolemia and its effects persisted 6 weeks after termination of the experiment. The administration of 2 x 500 mg ascorbic acid daily during one year resulted in an abrupt increase of ascorbemia and a marked accumulation of ascorbic acid in the leucocytes. Six weeks following interruption of ascorbic acid intake, vitamin C concentration in the leucocytes significantly declined but still continued to be twice higher than in the control receiving no ascorbic acid supplement.
D000368:Aged; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D002784:Cholesterol / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors
D002784:Cholesterol; D001205:Ascorbic Acid