Two groups of young male guinea‐pigs on a vitamin C‐fuee diet were given equivalent amounts of L‐ascorbic acid (vitamin C) from natural sources (blackcurrant juice concentrate (group C) and dried acerola cherry juice (group B)). A third group (A) received an equal amount of synthetic ascorbic acid in water. The overall growth rate was greatest in group C and the ascorbic acid concentrations in the spleen and adrenal glands were significantly greater in group C than in group A; group B (the dried acerola cherry juice group) gave interniediate values.
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Hughes et al. (1971) studied this question.
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