Linoleic acid, [LA] an essential fatty acid. Linolenic acid and linoleic acid are similarly named omega fatty acids that have different roles in health and nutrition. Linolenic acid most commonly refers to alpha-linolenic acid (ALA), an omega-3 fatty acid found in many nuts, vegetables and oils. Linoleic acid, on the other hand, typically refers to a type of omega-6 fatty acid commonly found in nut, seed and refined vegetable oils. It is used to prevent heart attacks, lower high blood pressure, lower cholesterol, and reverse “hardening of the blood vessels” (atherosclerosis) (see: Wikipedia).