The closest relationship between diet and blood pressure is first and foremost salt. There is a close relationship between salt intake and blood pressure because excessive salt consumption leads to water and sodium retention, which increases blood volume and increases blood pressure. Therefore, patients with hypertension emphasize a low-salt diet, with salt intake preferably below 5g per day. However, in China, especially in the northern region, the amount of salt is very high. If you are eating and feel salty is more appropriate, probably the amount of salt is at least 13-14g or more, so the relationship between 13-14g and 5g has to be removed by 2/3 to reach the standard. Especially for some salt-sensitive patients, it has a very big impact on blood pressure. So a low salt diet is needed for hypertension. For some high-fat, high-calorie diet, it will cause patients to be obese, and the proportion of obese patients with hypertension will be significantly higher. After obesity, the proportion of diabetes will also increase, and the incidence of hypertension in diabetics is more than two times that of non-diabetic people.