Butter is the unsaturated fatty acids after hydrogenation of the oil, good for preservation. Therefore, the content of unsaturated fatty acids is very low, high content of unsaturated fatty acids on the human body has great benefits, is conducive to the elimination of free radicals in the human body, and has the effect of cancer prevention, and at the same time have the effect of lowering cholesterol. Olive oil has a high content of unsaturated fatty acids, is more ideal for cooking oil.