Abstract
In 25 cases of pellagra and 10 healthy controls, the blood pyruvic acid levels in the fasting stage and after 60 and 90 minutes of glucose load were estimated by the technique of Friedmann & Haugen (1943) . The blood pyruvic acid levels after 60 and 90 minutes of glucose load were significantly higher in pellagrins as compared to controls. The following conclusions were drawn from this study: (i) that there is impairment of pyruvic acid metabolism in cases of pellagra, which is more marked in pellagrins with neurological manifestations than in those without; (ii) that after administration of nicotinic acid alone for 15 days the pyruvic acid levels returned to normal, thereby indicating that nicotinic acid deficiency is the cause of deranged pyruvate metabolism; (iii) that there is significant improvement in neurological status after nicotinic acid therapy.
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