How to confirm gilbert's syndrome?

Gilbert's disease: This is a common and benign condition where on a fasting lab your total and indirect bilirubin are elevated. Your liver is having problems conjugating the bilirubin. The rest of your liver enzymes should be normal and often the bilirubin is normal in a non fasting state.

Gilbert's: There are no discrete tests to diagnose Gilbert's syndrome. That is OK though, because the pattern of abnormalities in the indirect bilirubin is diagnostic. No test necessary. Hope that helps.