Sweet potato is rich in vitamins and trace elements, with high nutritional value, which can prevent constipation, relieve fatigue, improve human immunity and protect liver and kidney. Usually, you can eat some sweet potatoes properly, but don't eat too much, so as not to cause bloating, and sweet potatoes contain more sugar, which is easy to cause obesity. Eating sweet potatoes can help us keep folic acid at a normal level. If folic acid is too low, we are likely to get cancer. Therefore, eating sweet potatoes often has the effect of preventing cancer. In addition, sweet potato belongs to coarse grains, which can improve constipation and benefit intestinal health. The auxiliary hypotensive effect of sweet potato is mainly attributed to its rich potassium. Because potassium and sodium are important elements that affect blood pressure, if the human body ingests enough potassium, it will promote the blood to discharge excess sodium; Eating foods rich in potassium will also promote the balance of mineral levels in the body, and ultimately play a certain role in assisting blood pressure reduction.