Elevated HCY refers to hyperhomocysteinemia, which can be clinically unspecific if there is only a slight elevation in the blood test. The main risk of hyperhomocysteinemia is the damage to the large arteries in conjunction with hypertension, which leads to the formation and aggravation of atherosclerosis. If a patient has elevated HCY in combination with hypertension, the diagnosis is H-type hypertension, and treatment requires conventional blood pressure lowering therapy along with folic acid supplementation under medical supervision. If the patient has elevated HCY alone, without significant hypertension or atherosclerosis, lifestyle modification is the main focus, and it is recommended to increase the intake of foods with high folic acid content such as fruits and vegetables.