Abstract
The effects of dietary supplementation with vitamin C on several common laboratory values were assessed in 27 elderly patients in long-stay wards. The patients had shown low plasma ascorbic acid concentrations before the study. During three consecutive periods of six weeks the patients received either placebo or moderate (200 mg/day) or high (2000 mg/day) doses of vitamin C. There was a significant rise of serum folate concentration after both doses of vitamin C. A decrease of serum uric acid concentration after high doses of vitamin C was found. Supplementation with vitamin C did not affect other values of laboratory examinations determined. The results suggest that dietary supplementation with either moderate or high doses of vitamin C has only very few and small influences on common laboratory values in elderly patients.
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