Low LDL is not a significant risk. Generally speaking, the appropriate level of LDL reference value should be ≤3.4mmo/L, borderline level between 3.4~4.1mmol/L, elevated >4.1mmol/L. When LDL cholesterol is less than 3.4mmo/L, then it suggests that LDL cholesterol is low. Generally speaking, low LDL cholesterol can be seen in patients with excessive dietary restriction, weight loss, etc., which is generally not a particularly dangerous situation. However, it can also be seen in the absence of beta-lipoproteinemia, hyperthyroidism, and cirrhosis of the liver. For this reason, it is necessary to promptly investigate with the help of other clinical indicators in order to make a clear diagnosis. Meanwhile, LDL is a cholesterol-rich lipoprotein, which is one of the risk factors for atherosclerosis, so when it is elevated, it can aggravate the risk of atherosclerosis and needs to be taken seriously. It is recommended to consult a doctor as soon as possible to avoid delaying the condition.