The amount of a UDP-glucuronosyltransferase 1A1 (human) when measured in cerebrospinal fluid. The trait is level of UDP-glucuronosyltransferase 1A1 (human) in cerebrospinal fluid (OBA_2057414, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid UDP-glucuronosyltransferase 1A1 (human) amount.