Scientifically, it is an omega-9 unsaturated fatty acid. The benefits of oleic acid include lowering blood pressure and cholesterol, burning fat, helping to prevent type 2 diabetes, fighting infection, repairing the skin and fighting cancer. Its deficiency in the body increases the risk of cancer. It is naturally odorless and colorless and is found in animal and vegetable fats and oils. Its main sources are olive oil, oilseeds and nuts.