Recently, because an expert was talking about the benefits of mixing lard and vegetable oil on the show, this old-fashioned fallacy has become lively again. I criticized this wrong statement when I started blogging a few years ago, and since it came out to mislead everyone again, then I will approve him again!

　　 First of all, we have to figure out "can eat" and " It is not the same thing to recommend "a certain food." "Recommended to eat" a certain food (such as lard) must have reliable evidence that it is beneficial; on the contrary, if there is no reliable evidence that a certain food is harmful, then "can eat" . Our criticism here is the recommendation to eat lard.

　　 The focus of lard is undoubtedly the richer saturated fatty acids. The current World Health Organization (WHO) recommendation for saturated fatty acids is ≤10% of total energy. On this basis, "American Diabetes Association (ADA) Diabetes Diagnosis and Treatment Standards (2012)", "Chinese Diabetes Medical Nutrition Treatment Guidelines", "Chinese Adult Lipid Abnormality Prevention and Treatment Guidelines" all recommend that the recommended amount of saturated fatty acids is <7% of the total energy. Based on a total energy of 2000 kcal per day, the recommended amount of saturated fatty acids is <15 g/day (2000×7%÷9≈15).

　　 Next, look at how much saturated fatty acids are generally provided in daily food. One bag (250 grams) of milk provides 4 grams of saturated fatty acids, one (50 grams) egg provides about 1.5 grams of saturated fatty acids, 100 grams of pork (poster hips or elbows) provides about 10 grams of saturated fatty acids, 30 grams of vegetable oil (yes , Vegetable oil also contains about 15% of saturated fatty acids) to provide 4.5 grams. In addition, bread, biscuits, snacks, fish and shrimp, soy products, nuts and other foods also provide a small amount of saturated fatty acids. This shows that even if you do not eat lard deliberately (the saturated fatty acid content is 41%), the total daily intake of saturated fatty acids can easily exceed 15 grams. In this case, what reason do we recommend to eat lard? Eating lard will make the intake of saturated fatty acids exceed the upper limit recommended by WHO.

　　Another question is, should people who do not eat or rarely eat meat and egg milk (low saturated fatty acid intake) recommend some lard? Note that WHO or various guidelines Recommended is ≤10% or <7%, not necessarily 10% or 7%. That is to say, lower saturated fatty acid intake is no problem, and it does not lead to oxidation and aging, as some experts said. In addition, if people who don’t even eat meat, egg and milk, why should they eat lard?

　　 In short, there is no need and there is no evidence to support the recommendation to eat lard every day. It is wrong to say that lard and vegetable oil are mixed for consumption, whether they are mixed in 1:2 or 3:4. The Chinese Resident''s Dietary Guide 2007 recommended "edible multiple vegetable oils", but did not recommend lard or a mixture of lard and vegetable oil.