This invention provides methods of increasing or enhancing the synthesis andlevels of phospholipids, synapses, synaptic proteins, and synaptic membranesby a neural cell or brain cell; methods of treating a subject with a memory disorder,memory impairment, neurological disorder, or brain disease or disorder, comprisingadministering to the subject a composition comprising an omega-3 fatty acid,an omega-6 fatty acid, uridine, a metabolic precursor thereof, or a combinationthereof.