Arachidonic acid is an essential omega-6 PUFA,and is found in meat,chicken and egg and fish . Arachidonic acid is the most active omega-6 fatty acid.Free arachidonic acid is a transient, critical substrate for the biosynthesis of eicosanoid second messengers. Receptor-stimulated release, metabolism, and re-uptake of free arachidonate are all important aspects of cell signaling and inflammation.