Omegas, EFAs, CLA, and oils (particularly fish oils and omega oils) all are part of a group of fatty acids that come naturally in meats and certain other foods and have been shown to have a great range of health benefits. EFA stands for essential fatty acids and CLA stands for conjugated linoleic acid. The most common omegas are omega 3 and omega 6, which are commonly found in high amounts in fish.