Conjugated Linoleic Acid (CLA) – Conjugated linoleic acid (CLA) is a slightly altered form of the essential fatty acid linoleic acid. CLA is found mainly in dairy products and also in beef and poultry, eggs, and corn oil. Bacteria that live in the intestine of humans can produce CLA from linoleic acid, but supplementation of a rich source of linoleic acid did not produce increases in blood levels of CLA in one human study.1 CLA is available as a supplement.