A method for enhancing cognitive development in a pediatric subject involving administering to the subject a nutritional composition which includes up to 7 g/100 Kcal of a fat or lipid; up to 5 g/100 Kcal of a protein or protein equivalent source; 0.25 g/100 Kcal to 16 g/100 Kcal of buttermilk; 5 mg/100 Kcal to 90 mg/100 Kcal of a source of long chain polyunsaturated fatty acid; and 0.015 g/100 Kcal to 1.5 g/100 Kcal of a prebiotic.一種增進小兒個體認知發展之方法,其涉及將營養組成物投予至該個體,該營養組成物包括高達7g/100Kcal之脂肪或脂質;高達5g/100Kcal之蛋白質或蛋白質均等來源;0.25g/100Kcal至16g/100Kcal之酪乳;5mg/100Kcal至90mg/100Kcal之長鏈多不飽和脂肪酸來源;及0.015g/100Kcal至1.5g/100Kcal之益生質。