[Vitamin B1, B2 and B6 in erythrocytes in the nephrotic syndrome]

In 19 patients with nephrotic syndrome in different diseases not associated with reduction of the glomerular filtration surface vitamin B1 was within the reference range, vitamin B2 was insignificantly and vitamin B6 significantly reduced. The concentrations of vitamins B1, B2 and B6 in red blood cells were assessed by indirect enzymatic methods and were expressed as vitamin action. Long-term six-month riboflavin supplementation (2 mg/24 h) and pyridoxine (50 mg/24 h) in seven patients improved vitamin B2 and B6 levels in erythrocytes independently on the regression of the clinical and laboratory activity of the basic disease.