Food cannot play a direct role in lowering blood pressure, but can only assist in lowering blood pressure to a certain extent. In addition, adhering to a good lifestyle and maintaining a happy mood can help control blood pressure. If the patient’s blood pressure is high, on the basis of dietary regimen and exercise, it is also necessary to use drugs to lower blood pressure so as not to cause target organ damage. The common foods that help patients lower their blood pressure are: 1, onion: research shows that onions contain a prostaglandin A, not only to soften blood vessels, but also to reduce blood viscosity, increase coronary blood flow, have a certain role in regulating blood pressure. In addition, prostaglandin A can also promote sodium excretion by increasing urine volume, which has a role in regulating blood lipids, lowering blood pressure and preventing blood clots. However, the prostaglandin A content in onions is less, so onions may only have an auxiliary effect on lowering blood pressure; 2, celery: rich in dietary fiber and crude fiber, both of which are good for controlling blood pressure. The content of apigenin is more prominent, can inhibit vascular smooth muscle cells, diastolic blood vessels, for lowering blood pressure may have a certain auxiliary effect; 3, water chestnut: Chinese medicine believes that water chestnut is sweet and cold in nature, with the effect of clearing heat and phlegm, appetite and eliminating food. Studies have found that water chestnut contains the anti-disease ingredient water chestnut Ying, which may have some auxiliary effect on lowering blood pressure. In addition, most of the fresh seasonal fruits and vegetables commonly found in life are rich in dietary fiber and vitamins, which are beneficial for lowering blood pressure. If you want to help control blood pressure through diet, three meals should also pay attention to the structure of the diet, eat more fruits and vegetables, and eat less high-salt and high-fat food.