Monitoring and Management for Gilbert Syndrome

Diagnostic Considerations

In Gilbert syndrome, unconjugated bilirubin predominates, typically making up more than 80% of total bilirubin, according to the American Gastroenterological Association 1, 2

The European Association for the Study of the Liver recommends routine monitoring of bilirubin levels, particularly during periods that might trigger hyperbilirubinemia, such as fasting or illness 3, 4
When evaluating elevated bilirubin, the amount of conjugated bilirubin should be calculated, which should be less than 20-30% of total bilirubin in Gilbert syndrome, as suggested by the American Gastroenterological Association 2

Patients with Gilbert syndrome can safely fast, including religious fasting like Ramadan, but should have regular follow-up of their bilirubin levels, as recommended by the European Association for the Study of the Liver 3, 4
Initial increases in plasma unconjugated bilirubin concentration may occur in the first days of fasting but typically decrease gradually to basal values by the end of the fasting period, according to the European Association for the Study of the Liver 3
When starting new medications, bilirubin levels should be monitored more frequently during the initial period, as advised by the American Autoimmune Related Diseases Association 5