Lipoprotein a 500mg/L is dangerous. Clinically, lipoprotein A is mainly synthesized in the liver, and the substance may promote the formation of atherosclerosis in the coronary arteries or clavicular arteries, which may lead to cardiovascular and cerebrovascular diseases such as myocardial infarction and cerebral infarction. The normal value of this substance is between 0 and 300mg/L. If the value of lipoprotein a reaches 500mg/L or more, it is a dangerous situation. In this case, there is a higher risk that one may suffer from acute myocardial infarction, acute cerebral infarction, etc. It is recommended that one seek immediate medical attention and treatment under the guidance of a doctor. Usually for patients with very high lipoproteins, lipid-lowering drugs can be chosen for treatment, such as niacin, acyclovir, coenzyme Q10 and so on. After taking them, they can make the total cholesterol low, as well as make the level of LDL and triglyceride decrease. It is very effective in treating the symptoms of very high lipoprotein. Usually after the appearance of lipoprotein a500mg / L, it is recommended to consult a doctor in time, under the guidance of a comprehensive assessment of the condition and then treatment.