Fatty acid is a carboxylic acid with a long aliphatic chain, which is either saturated or unsaturated. Fatty acids that have carbon-carbon double bonds are known as unsaturated. Fatty acids without double bonds are known as saturated. The unsaturated fatty acids are considered as the good fats, which help to dissolve fat-soluble vitamins, and are required for biochemical processes. Whereas, saturated fatty acids are usually considered to be the bad fats, as they tend to accumulate on the vessel wall, and affect the cardiovascular systems. Many diseases are also found to be caused by a high level of those bad fats in body.