Key Difference – Direct vs Indirect Bilirubin Bilirubin is the catabolic product of haemoglobin. Bilirubin exists in two main forms; conjugated and unconjugated bilirubin. The metabolism of bilirubin takes place predominantly in the liver. Bilirubin enters the liver in the unconjugated form and thereby converted to the conjugated form after some metabolic conversions. The […]