Low homocysteine is not clinically significant because homocysteine is normally broken down in the body, so the blood level itself is low. Because it is not a pathological condition, on the contrary, when it is low the body has a low probability of cardiovascular disease. Homocysteine can be metabolized by the body to a low state under normal conditions, usually less than 10 units, and the normal value is less than 6. If it is greater than 15, homocysteinemia can be diagnosed. In the event of hypertension, coronary atherosclerotic heart disease, cerebrovascular infarction, cerebral hemorrhage, peripheral vascular occlusion and other diseases, the homocysteine of the patient will increase, and the higher the value the higher the incidence, mostly seen in the middle-aged and elderly population. Therefore, it is possible to reduce homocysteine in daily life by eating more fruits and vegetables.