1, efficacy: lowering blood pressure. When the human body consumes too much sodium salt, it can balance the electrolyte in the body by eating some apples. This is because apples contain more potassium, which can be replaced with excess sodium salt in human blood and excreted, thus regulating the balance of potassium and sodium in human body and protecting blood vessels. Therefore, apple is a healthy food for patients with hypertension and nephritis edema.

2. Taboo: Apples should not be eaten with seafood, because apples contain tannic acid. Eating with seafood will not only reduce the nutritional value of seafood protein, but also cause abdominal pain, nausea and vomiting. Similarly, other fruits with more tannins, such as strawberries, bayberries, persimmons, pomegranates, lemons, grapes, sour pomelo and so on. Are not suitable for eating with seafood.