Compositions including an effective amount of each of phosphatidyl serine, choline, and oleic acid, and methods for improving cognitive performance that include administering such compositions to a subject, are described herein. The compositions can be nutritional compositions such as bars or liquids suitable for oral administration. The combination of phosphatidyl serine, choline, and oleic acid provides synergistic or complimentary modes of action that improve the overall effect of these compounds.本文闡述包含有效量之各磷脂醯絲胺酸、膽鹼及油酸之組合物及改良認知能力的方法,該等方法包含向個體投與該等組合物。該等組合物可為適於經口投與之營養組合物,例如棒狀物或液體。磷脂醯絲胺酸、膽鹼及油酸之組合提供改良該等化合物之整體效應之協同或互補作用模式。