The amount of a 2-arachidonoyl-sn-glycero-3-phosphocholine when measured in blood. The trait is Ontology of Biological Attributes term OBA_2050403 (level of 2-arachidonoyl-sn-glycero-3-phosphocholine in blood). Also known as: blood 2-arachidonoyl-sn-glycero-3-phosphocholine amount.