This invention provides methods of enhancing brain development; increasing or enhancing intelligence; increasing or enhancing synthesis and levels of phospholipids, synapses, synaptic proteins, and synaptic membranes by a neural cell or brain cell, comprising contacting a subject or a pregnant or nursing mother thereof with a composition comprising an omega-3 fatty acid, an omega-6 fatty acid, and/or uridine, a metabolic precursor thereof, or a combination thereof.