Low LDL means that the ability to transport cholesterol from the liver to tissues throughout the body is reduced. The term LDL refers to cholesterol-rich lipoproteins. LDL in the blood is converted primarily through very low-density lipoproteins synthesized in the liver, and to a lesser extent, directly synthesized by the liver, with a normal range of 3.12 mmol/L or less. The main reasons for low LDL include liver dysfunction, light diet, and high daily exercise: 1. People with liver dysfunction have severe liver cell destruction, two synthesis pathways are affected, and less raw material is available for synthesizing LDL. 2. Diet is too light, only eat vegetables, fruits, do not eat fat meat and other meat products, lack of synthetic raw materials. 3. Daily exercise, physical energy consumption is large, exercise to strengthen the body’s metabolism, LDL running cholesterol to the whole body tissue rate accelerated, the equivalent of the car is not enough to load the goods, LDL is less. It is recommended that patients with the above conditions go to a regular hospital in a timely manner, under the guidance of a doctor to standardize the treatment, so as not to delay the condition.