Symmetrical TAGs, such as saturated-unsaturated saturated molecules (SUS) present in palm oil can induce the increase in hardness in refrigerated margarines, a phenomenon known as post hardening.
Consequently, studies are focused on the adjustment of palm oil and its fractions for uses in food product. Liquid oils when subjected to total catalytic hydrogenation are transformed into a fully saturated product known as hard fats that can be used as alternatives to improve functional characteristics of lipid systems.