A. Dietary principles 1, control calories and weight. Obesity is one of the risk factors of hypertension, and the main reason for obesity is the calories into the super caused. Excess heat in the body can be converted into fat stored in the subcutaneous and body tissues, thus leading to obesity. Some people observe that obese people who exceed the normal weight of 25 kg, their systolic blood pressure can be higher than normal people 1.33 kPa (10 mm Hg), diastolic blood pressure high 0.93 kPa (7 mm Hg). Therefore, controlling caloric intake and maintaining ideal body weight is one of the important measures to prevent and treat hypertension. 2.Salt restriction. Epidemiological surveys have proved that salt intake is positively correlated with the onset of hypertension, and the incidence of hypertension is significantly higher in areas where salt is sold in large quantities. Therefore, it is generally advocated that where there is mild hypertension or a family history of hypertension, the salt intake is best controlled at less than 5 grams per day, and salt intake should be more strictly limited for those with high blood pressure or combined heart failure, with 1 to 2 grams of salt per day is appropriate. 3, control dietary fat. The caloric ratio of food fat should be controlled at about 25%, and the maximum should not exceed 30%. The quality of fat has more important significance than its quantity. Animal fats contain high saturated fatty acids, which can raise cholesterol and lead to thrombosis and increase the incidence of hypertensive stroke; while vegetable fats contain high unsaturated fatty acids, which can prolong platelet agglutination time, inhibit thrombosis, lower blood pressure and prevent stroke. Therefore, it is advisable to eat more vegetable oils, other foods should also be used low saturated fatty acids, low cholesterol food, such as vegetables, fruits, whole grains, fish, poultry, lean meat and low-fat milk. 4, eat more food rich in vitamin C, such as vegetables, fruits. New research has found that in elderly patients with hypertension, those with the highest vitamin C content in the blood have the lowest blood pressure. It is believed that vitamin C has the role of protecting the endothelial cells of arterial blood vessels from damage by harmful substances in the body. 5, to ensure adequate intake of calcium in the diet. According to research reports, the daily diet, calcium intake of 800 to 1000 mg, can prevent blood pressure rise. Epidemiological survey data prove that the average daily intake of calcium 450 to 500 mg of the population than the intake of calcium 1400 to 1500 mg of the population, the risk of hypertension is two times higher. It has been estimated that if the average daily calcium intake of the population is increased by 100 mg, the average systolic blood pressure can be reduced by 0.33 kPa (2.5 mm Hg) and the average diastolic blood pressure by 0.173 kPa (1.3 mm Hg). In recent years the popular around the vinegar egg therapy has a significant blood pressure lowering effect, increased calcium intake may be one of the reasons. Second, recipe examples Breakfast: rice porridge (rice 50 grams) steamed cake (flour 40 grams, cornmeal 10 grams, sugar 5 grams) curd 1 piece sea rice mixed with spinach (sea rice 10 grams, spinach 100 grams) Additional meal: fruit 200 grams Lunch: rice (rice 150 grams) shredded meat fried celery (lean pork 50 grams, celery 100 grams) seaweed tofu soup (tofu 200 grams, seaweed 50 grams) Dinner. Millet congee (millet 50g) Bean bread (flour 50g, adzuki beans 20g, sugar 5g) Steamed scallop (scallop 100g) Stir-fried baby bok choy (baby bok choy 200g) Oil for cooking 20g for the whole day. The total daily caloric energy is about 8400 kJ (2000 kcal). Third, food selection points 1, control caloric energy must control the intake of staple foods and fat, as little as possible or do not use candy snacks, sweet drinks, fried foods and other high-calorie foods. 2, reduce the amount of salt used in cooking, as little as possible to eat pickles and other types of salt cured food. 3, eat less fatty meat and various animal fats, control animal brains, fish roe and other high cholesterol foods. Try to use soybean oil, peanut oil, sunflower oil and other vegetable oils. 4, eat more vegetables, fruits, especially dark vegetables. 5, appropriate to increase the intake of seafood, such as seaweed, nori, sea fish, etc.