title: Vitamin C status of patients with chronic renal failure, dialysis patients and patients after renal transplantation.
abstract: The vitamin C status of patients with chronic renal failure (CRF), dialysis patients (DP) and patients after renal transplantation (RT) was the object of this investigation. Levels of vitamin C intake from dietary records were estimated at mean values of 93.5 mg/d (CRF), 65.5 mg/d (DP) and 163.9 mg/d (RT). Compared to the recommendation of the German Society of Nutrition (75 mg/d), this indicated a normal range of supply for all groups except the group of DP. The corresponding mean plasma concentrations were 62.2 mumol/l (CRF), 80.3 mumol/l (DP) and 68.8 mumol/l (RT). Supplements of 60 or 100 mg vitamin C given to patients of the DP-group after each dialysis session showed slightly, but not significantly higher concentrations of vitamin C in plasma. During dialysis treatment, plasma vitamin C concentrations dropped to approximately 50% of the basal value, but almost reached initial levels again 44 hours later, both with and without supplementation. During one treatment period, vitamin C loss in the dialysate of three patients ranged between 92.5 and 333.6 mg. The amount of vitamin C in plasma, however, dropped to approximately 50% of the basal value for these patients, too.
authors.affiliation: Institute of Nutrition and Environment, University of Jena.
authors.forename: V
authors.initials: V
authors.lastname: Böhm
authors.forename: K
authors.initials: K
authors.lastname: Tiroke
authors.forename: S
authors.initials: S
authors.lastname: Schneider
authors.forename: H
authors.initials: H
authors.lastname: Sperschneider
authors.forename: G
authors.initials: G
authors.lastname: Stein
authors.forename: R
authors.initials: R
authors.lastname: Bitsch
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000097:blood* / Q000378:metabolism; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000628:therapy*; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D009751:Nutritional Requirements; D009752:Nutritional Status; D006435:Renal Dialysis
chemical_list: D001205:Ascorbic Acid