It is generally not recommended to consume a single type of cooking oil for a long period of time. It is recommended to consume vegetable oils as the mainstay, alternating with a variety of vegetable oils or consuming blended oils. There are very many types of cooking oils in normal life, such as olive oil, soybean oil, sunflower oil, corn oil and so on. Different oils have different nutritional characteristics, such as soybean oil, soybean oil per 100 ml contains 899 calories, the relevant research data determined that its polyunsaturated fatty acids 57.74 grams, monounsaturated fatty acids 22.78 grams, while rich in a variety of vitamins A, vitamin D, vitamin E, vitamin K and so on. Due to the different fats and oils, the three major fatty acids (polyunsaturated fatty acids, monounsaturated fatty acids, saturated fatty acids) have different ratios, so it is best to eat a mixture of fats and oils or take turns to eat, avoiding the long-term use of a single fat, in order to meet the body’s needs for various fatty acids. At the same time, it is recommended to try to unsaturated fatty acids accounted for a high proportion of vegetable oils, the vast majority of animal fats and oils saturated fat accounted for a higher proportion of cardiovascular unfavorable.