Gilbert's syndrome overview

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Gilbert's syndrome (pr. Zhil-bear), often shortened to the acronym GS, is the most common hereditary cause of increased bilirubin, and is found in up to 5% of the population. The main symptom is otherwise harmless jaundice which does not require treatment, caused by elevated levels of unconjugated bilirubin in the bloodstream (hyperbilirubinemia).

The source of this hyperbilirubinemia is reduced activity of the enzyme glucuronyltransferase which conjugates bilirubin and some other lipophilic molecules. Conjugation renders the bilirubin water-soluble and suitable for excretion via the kidneys.