The invention comprises a cooked food comprising an ingredient selected from the group consisting of a prepared conjugated linoleic acid, an ester thereof, a non-toxic salt thereof, diglyceride and triglyceride esters of various isomers of conjugated linoleic acids, conjugated dienes of long-chained fatty acids, and mixtures thereof, said ingredient being present in an amount of at least 3 milligrams per gram of lipid in the food. A portion of the ingredient is present in the food after cooking.