Changes in concentration of some vitamins in organs and urine of albino rats during chronic exposure to 3,4-benzpyrene and sulfur dioxide

In albino rats exposure for long periods to 3,4-benzpyrene alone or in conjunction with sulfur dioxide leads to a decrease in the concentrations of thiamine and riboflavin in the liver and brain and to an increase in the excretion of vitamins, B1, B2, PP, and C in the urine.