What is the normal range for jaundice?
Jul 10, 2025
Source: Cainiu Health
Dr. Shen Yonghua
Introduction
The normal serum bilirubin levels in newborns change dynamically after birth. Within 24 hours after birth, the level should not exceed 6 mg/dL; within 48 hours, it should not exceed 9 mg/dL; and within 72 hours, it should not exceed 12 mg/dL. The levels then gradually decline and return to normal within approximately two weeks. Exceeding these values may cause yellowing of the skin and sclera, requiring close monitoring.
Under normal circumstances, the normal range of jaundice varies depending on the population, with different standards for newborns and adults. A detailed analysis is as follows:
In newborns, the normal serum bilirubin value dynamically changes after birth. It should not exceed 6 mg/dL within the first 24 hours, 9 mg/dL within 48 hours, and 12 mg/dL within 72 hours. Afterward, it gradually declines and returns to normal levels within approximately two weeks. Exceeding these values may cause yellowing of the skin and sclera, requiring close monitoring.
In adults, the normal serum bilirubin value generally does not exceed 1.7 mg/dL. Values beyond this range may indicate abnormal liver function, biliary obstruction, or hemolytic disease. Mild elevations may not cause obvious symptoms, while significant increases may result in yellowing of the skin and darkened urine, necessitating further investigation of the underlying cause.
When symptoms of jaundice or abnormal bilirubin levels are detected, prompt medical consultation is necessary to determine the cause. In newborns, bilirubin levels should be closely monitored, while in adults, liver function and biliary system status should be evaluated to avoid delays in disease treatment.
