Fat, which is widely found in animal foods such as fish, egg, milk and vegetable oils, is one of the nutrients required by the human body, mainly including saturated fatty acids and unsaturated fatty acids. The former is more abundant in animal foods, and the latter is more abundant in vegetable oils, or put another way, animal fats (including animal foods and meat oils) are mainly saturated fatty acids, and vegetable oils are mainly unsaturated fatty acids. A large number of studies have shown that excessive intake of saturated fatty acids is extremely harmful to health, including causing cardiovascular and cerebrovascular diseases, tumors, and obesity. Therefore, almost all health-related authorities advocate reducing the intake of saturated fatty acids. The World Health Organization (WHO) recommends that saturated fatty acids in the diet provide less than 10% of the total energy; the Chinese Nutrition Society recommends that saturated fatty acids in the diet and not The ratio of saturated fatty acids is 1:2.

　　It should be pointed out that this fatty acid ratio refers to all fatty acids in the daily meal (mainly including fish, egg, milk and cooking oil), not just the fatty acids in cooking oil. Therefore, it cannot be considered that the ratio of fatty acids in cooking oil should be 1:2, nor can it be concluded that the ratio of meat oil to vegetable oil is 1:2. Others suggest that the optimal ratio of meat oil to vegetable oil is 7:10 or 3:4, and these ratios are wrong! The Chinese Resident’s Dietary Guidelines 2007 clearly states, “Overall, saturated fatty acids and cholesterol in animal fats Those with high content should eat less". The characteristic of meat oil is "high content of saturated fatty acids and cholesterol", so you should eat as little as possible. Considering that the nutritional characteristics of different cooking oils are different, the guide also recommends that "the type of cooking oil should be changed frequently, and a variety of vegetable oils should be consumed." ("Dietary Guidelines for Chinese Residents 2007", edited by Chinese Nutrition Society, published by Tibet People''s Publishing House, p. 51). Note that although the guide recommends that cooking oil be diversified, it does not include meat oil, and it does not recommend any proportion! In fact, the dietary guide issued by the Chinese Nutrition Society in 1997 has a more explicit statement on this: "Less fat Meat and meat oil".

　　 In short, the suggestion that cooking oil is used according to a certain proportion of meat oil is not only theoretically unfounded, but also obviously contradicts the dietary guidelines issued by the Chinese Nutrition Society, which is wrong. Under normal circumstances, vegetable oil should be used to cook food as much as possible. Only when the intake of fish, egg, milk, etc. is very small, can you consider the use of some meat oil.