Which oils are healthier and won't get sick?

Fatty acid is the main component of fat, and it is one of the most important nutrients in human body, just like vitamins and amino acids. In biology, fatty acids are divided into saturated fatty acids and unsaturated fatty acids, and unsaturated fatty acids are divided into polyunsaturated fatty acids and monounsaturated fatty acids, which play different roles in human body. The daily fat intake of each person can only account for 20% of the total daily food calories (the daily fat consumption is controlled at 1.5 ~ 30ml), and each person should eat all three fatty acids every day, without favoring any kind of fat, otherwise the fat intake will be unbalanced, resulting in diseases. The daily intake of unsaturated fatty acids should be 10%, polyunsaturated fatty acids should be 10%, and saturated fatty acids should be lower than 10%. Fats rich in monounsaturated fatty acids and polyunsaturated fatty acids are liquid at room temperature, mostly vegetable oils, such as peanut oil, corn oil, soybean oil and rapeseed oil. Fat mainly composed of saturated fatty acids is solid at room temperature, mostly animal fat, such as butter, sheep oil, lard and so on. But there are exceptions For example, deep-sea fish oil is animal fat, but it is rich in polyunsaturated fatty acids. The main components of animal oil, coconut oil and palm oil are saturated fatty acids, but the content of polyunsaturated fatty acids is very low. Vegetable oils such as sunflower oil, millet oil and soybean, and the fats contained in marine fish are mostly polyunsaturated fatty acids.