Mustard oil has about 60% monounsaturated fatty acids (MUFA), 21% polyunsaturated fats (PUFA) and about 12% saturated fats.These fatty acids are also called 'good fats' as they do not get deposited on arterial walls.Mustard oil massage helps stimulate blood circulation to the skin. The oil is warming to the skin and will cause the massaged area to flush pink because of the increased blood flow. Massaging the oil in circular and upward movements helps in tightening loose skin.