The Total Bile Acid test is a highly specialized and sensitive measure of your liver's true, real-time function. Bile acids are made by the liver and are essential for digestion. A healthy liver clears them from the blood. If this function is impaired (a condition called cholestasis, common in pregnancy or with gallstones), bile acid levels in the blood will rise. This simple blood test provides a superior, functional assessment, offering a clear window into your liver's most essential digestive tasks.