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American Journal of Clinical Nutrition, Vol 32, 530-539, Copyright © 1979 by The American Society for Clinical Nutrition, Inc
ORIGINAL RESEARCH COMMUNICATIONS |
A Kallner, D Hartmann and D Hornig
The time course of radioactivity in plasma and urine after oral administration of a single dose of (1-14C)ascorbic acid has been followed in healthy nonsmoking male volunteers. The investigation was carried out under steady state conditions with regard to ascorbic acid intake (30 to 180 mg/day). Using pharmacokinetic principles, turnover, pool size, and rates of metabolism and excretion could be calculated. It was found that the half-life of ascorbic acid was inversely related to the dosage and that the pool could be increased to about 20 mg/kg bodyweight by increasing the dosage. It was concluded that on a daily intake of about 100 mg ascorbic acid this pool size would be reached in 95% of the population.
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