A saturated fatty acid found naturally in fish and vegetable oils, and it can also be formed by the hydrogenation of arachidonic acid. Diets rich in saturated fatty acids such as arachidic acid, are known to increase serum low-density lipoproteins resulting in high blood cholesterol levels. Because of its surfactant-like properties, arachidic acid is used in the manufacture of pharmaceuticals, soaps, cosmetics, and food packaging.A saturated fatty acid. A saturated fatty acid found naturally in fish and vegetable oils, and it can also be formed by the hydrogenation of arachidonic acid. Diets rich in saturated fatty acids such as arachidic acid, are known to increase serum low-density lipoproteins resulting in high blood cholesterol levels. Because of its surfactant-like properties, arachidic acid is used in the manufacture of pharmaceuticals, soaps, cosmetics, and food packaging. A saturated fatty acid.