Blood fat is a very general term, including cholesterol, triglycerides, and phospholipids in the blood. These lipids must be assembled with specialized proteins into tiny tiny "balls" to "dissolve" in the blood for transportation . These small balls in the blood are called "lipoproteins" and are classified according to their density. Among them, 2 types of lipoproteins have a great impact on cardiovascular health, and one type is called "low-density lipoprotein" (clinically tested "low-density lipoprotein cholesterol". , LDL-C), which is the main risk factor for atherosclerosis, is often regarded as "bad cholesterol", rather low than high; another type is called "high density lipoprotein" (clinical testing "high density lipoprotein cholesterol ", HDL-C), which can prevent atherosclerosis, is "good cholesterol", high is better than low. LDL-C and HDL-C are blood lipid indicators that are particularly valued in physical examination or clinical work.

　　Edible oil we eat every day, including cooking oil (such as fried dishes, fried fish, etc.) and oil added by processed foods (such as bread, biscuits, etc.) can affect the "bad cholesterol" or "good" in the blood Cholesterol" concentration, which affects cardiovascular health.

　　Most vegetable oils, such as soybean oil, peanut oil, corn oil, sunflower oil, walnut oil, sesame oil, etc., are "good oils", rich in linoleic acid, which can lower blood cholesterol when eaten in moderation , Especially bad cholesterol. There are several vegetable oils that are particularly recommended, including olive oil, camellia seed oil, and canola oil (high oleic rapeseed oil), which are rich in oleic acid, can reduce bad cholesterol, increase good cholesterol, and kill two birds with one stone. Therefore, most dietary guidelines recommend eating a variety of vegetable oils and adding oleic acid-rich vegetable oils such as olive oil.

　　But you must not think that all vegetable oils are good, palm oil and coconut oil are two very common "bad oils", they are rich in saturated fatty acids (including palm oil, myristic acid, etc.) , Will increase bad cholesterol. The average family will not buy palm oil or coconut oil, but they consume a lot (mainly palm oil). Because of their low price, good taste and easy processing, they are widely used in processed foods. You will always see "palm oil" in the food labeling ingredients of processed foods such as bread, biscuits, instant noodles, fried foods, puffed foods, instant foods, snacks and other processed foods. Some food labeling ingredient lists do not write "palm oil", but write "refined vegetable oil", "refined edible oil" or "hydrogenated vegetable oil", "plant shortening", "vegetable cream" (margarine), etc. Bajiu is also palm oil.

　　 "hydrogenated vegetable oil", "vegetable shortening", "vegetable cream" (margarine), etc. are more unbearable than palm oil, because they often contain "trans fatty acids", which are in the "hydrogenated" The "or artificial" process will raise bad cholesterol and lower good cholesterol, and must be strictly restricted. According to the recommendations of the World Health Organization (WHO), the daily intake of trans fatty acids should not exceed 2 grams. Many processed foods label nutrition ingredient list states that trans fatty acids are "0", but the meaning of "0" here is not not, but