Which vitamin deficiency causes excretion of xanthurenic acid?
Pyridoxine deficiency causes the increased excretion of xanthurenic acid Pyridoxal phosphate is required for the synthesis of niacin from tryptophan.Kylureninase is a dependent enzyme.Hence in Pyridoxine deficiency there is a less production of niacin.Moreover, kylurenine is not conveable fuher which is metabolised to xanthurenic acid and excreted through urine. REFERENCE : DM.VASUDEVAN.Textbook of Biochemistry.6th edition Page no 397
Folic acid
Pyridoxine
Niacin
Vitamin B12
vitamins