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Related Experiment Videos

Interaction of erythorbic acid with ascorbic acid catabolism.

D Hornig, H Weiser

    International Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition
    |January 1, 1976
    PubMed
    Summary

    Erythorbic acid accelerates vitamin C (ascorbic acid) breakdown in guinea pigs, reducing its availability and body pool size. This effect persists even with additional vitamin C supplementation.

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    Area of Science:

    • Biochemistry
    • Nutritional Science
    • Animal Physiology

    Background:

    • Vitamin C (ascorbic acid) is essential for guinea pig health.
    • Erythorbic acid is structurally similar to ascorbic acid but has lower biological activity.
    • Understanding the interaction between these compounds is crucial for nutritional studies.

    Purpose of the Study:

    • To investigate the effect of erythorbic acid supplementation on ascorbic acid catabolism in guinea pigs.
    • To determine if erythorbic acid impacts ascorbic acid bioavailability and body pool size.
    • To assess the influence of erythorbic acid on guinea pig weight gain.

    Main Methods:

    • Guinea pigs were depleted of vitamin C for 12 days.
    • Animals were supplemented with either erythorbic acid (50 mg/day/kg) or ascorbic acid (5 mg/day/kg) for 16 days.

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  • A tracer dose of (1-14C) ascorbic acid was administered to measure catabolism and bioavailability.
  • Half-life, radioactivity retention, body pool size, and weight gain were assessed.

    • Main Results:

    • Erythorbic acid significantly accelerated (1-14C) ascorbic acid catabolism, reducing its half-life from 97 h to 50-59 h.
    • Ascorbic acid bioavailability was reduced by nearly 50% when erythorbic acid was co-administered.
    • Erythorbic acid supplementation led to reduced body pool size of ascorbic acid and decreased weight gain.

    Conclusions:

    • Erythorbic acid significantly enhances the catabolism of ascorbic acid in guinea pigs.
    • The presence of erythorbic acid markedly reduces ascorbic acid bioavailability and body stores.
    • Erythorbic acid supplementation negatively impacts guinea pig growth and vitamin C status, irrespective of additional ascorbic acid intake.