Erythrocyte vitamin B1, B2 and B6 in nephrotic syndrome.

Vitamin status was evaluated in 33 patients with chronic glomerulonephritis and nephrotic syndrome who had normal glomerular filtration rates. Erythrocyte vitamin B1 and B2 were within the normal reference range. Vitamin B6 was significantly decreased. Long-term, 6-month supplementation with riboflavin, 2 mg/24 h, and pyridoxine HCl, 50 mg/24 h, in 9 patients improved erythrocyte vitamin B2 and B6 levels even though the clinical status and the disease activity of the basic disease persisted or progressed.