Hyperhomocysteinemia usually does not affect the life expectancy of patients, so there is no need to worry too much. Hyperhomocysteinemia is defined as a condition in which the level of homocysteine in the blood serum exceeds 15 umol/L. Current research confirms that hyperhomocysteinemia is prone to hypertension, coronary heart disease, and in particular, atherosclerosis. Therefore, this disease can cause cardiovascular and cerebrovascular diseases, which can increase the risk of coronary heart disease, hypertension, cerebral hemorrhage, cerebral infarction, and may also lead to Alzheimer’s disease. This disease usually does not affect the patient’s life expectancy, but should be actively treated to avoid causing the above complications, can be appropriate supplementation of vitamin B6, vitamin B12 and folic acid, while restricting the intake of methionine, dietary reduction of animal protein intake, in order to reduce the plasma level of homocysteine. Patients are advised to consume more folic acid-rich foods, such as carrots, nuts, beans, coarse grains, green vegetables, etc., pay attention to a light diet, drink more water and exercise.