keyword: polyunsaturated fatty acids, PUFA,linoleic acid, linolenic acid 

These are fatty acids having two or more double bonds in their carbon chain. The most common polyunsaturated fatty acids are linoleic acid (C18: 2) and linolenic acid (C18:3). Corn oil, sunflower oil and soybean oil are examples of vegetable oils rich in polyunsaturated fatty acids. Palm oil contains about 10% linoleic acid and about 0.5% linolenic acid.