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[B group vitamin metabolism in duodenal ulcer disease, hypertension, and ischemic heart disease].

No differences were found in the rate of metabolism of vitamins B1, B2, B6 and niacin either in healthy persons or in patients with duodenal ulcer, hypertension of the 2nd degree and with ischemic heart disease as shown by excretion of riboflavin, 4-pyridoxylic acid, 1-methyl nicotinamide and thiamin with urine which correlated with concentration of these vitamins and their coenzyme forms in blood plasma and erythrocytes. Dependence of these vitamins excretion with urine on their concentration in blood and the vitamins content in food appear to demonstrate similar consumption of vitamins B in the persons studied; at the same time, evaluation of the vitamins consumption in the patients with these forms of pathology should be performed using the criteria suitable for healthy persons. Dissimilar rates of metabolism of these vitamins described in literature might be related to differences in nutrition as well as to the use of nonspecific techniques for estimation of the vitamins. Besides, initial consumption of vitamin B2 was not sometimes considered, but deficiency in riboflavin caused considerable impairments of vitamin B6 and niacin metabolism.