Synthesized within the liver and subject to enterohepatic circulation through biliary secretion into the upper GIT. May be assessed as a single sample or as part of a dynamic/ challenge test. Bile acids alter with decreased functional hepatic mass, hepatic dysfunction, cholestasis and an anomaly of the portal vasculature. May be assessed in a variety of species including birds and exotics. May be requested individually or as part of a profile. For additional information see our fact sheet on serum bile acids.