Blood lipid is the general name of neutral fat and lipid-like in blood, which is widely existed in the human body and is essential for the basic metabolism of tissue cells. The causes of low blood lipids include insufficient intake, disease factors or drug factors, as follows: 1. Insufficient intake, due to long-term over-controlled diet, too light diet or malabsorption, the intake of blood lipids cannot meet the body’s needs, and the detection of blood lipids in the body will show results lower than normal, suggesting insufficient blood lipids in the body. 2. Disease factors, serious liver diseases, such as cirrhosis and acute heavy hepatitis, as well as Hyperthyroidism, anemia, malnutrition, malignant tumor, etc. will make the body lipids lower than normal. HDL cholesterol is good cholesterol, and its elevation facilitates the removal of total cholesterol from peripheral tissues, thus preventing the development of atherosclerosis, which occurs when other damaging cholesterol is elevated, such as when atherosclerosis occurs. In addition, HDL cholesterol is also lowered in cases of acute infection, diabetes, nephrotic syndrome, etc. 3. Drug factors, the use of certain drugs, such as lipid-lowering drugs, thyroid hormones, estrogen, etc., can make blood lipids lower than normal.