[Comparative biochemical evaluation of riboflavin body status].

The correlation's between the parameters used as biochemical criteria of vitamin B2 provision were studied in rats fed with riboflavin-enriched diets. Based on riboflavin-binding apoprotein, highly specific assays of riboflavin in tissues, blood and urine revealed close correlation between levels of the vitamin in plasma, red cells, the activity of erythrocytic glutathione reductase, PAD-effect, B2 diet intake, its content in the liver as well as between any of the above parameters in couple. This supports adequacy and interchangeability of the parameters studied which makes it possible to use any of them for detecting vitamin B2 deficiency and relevant vitamin status of the body.