Conjugated linoleic acid is a term used to describe a group of isomers of linoleic acid. Linoleic acid is a polyunsaturated omega-6 fatty acid found in many vegetable oils. Conjugated linoleic acid has been shown in numerous studies to be a strong cancer fighting agent, and also to aid in the reduction of fat in obese people. Conjugated linoleic acid has also been linked to increasing insulin levels in diabetics, increasing metabolic rate.