★Bile pigment(胆色素)is the main catabolic product of iron porphyrin(铁卟啉)compound in the body, consisting of bilirubin(胆红素), biliverdin(胆绿素), bilinogen(胆素原) and bilin(胆素).

★胆色素代谢主要指胆红素代谢。胆红素为金黄色，为胆汁的主要颜色。