1. Lettuce is a vegetable with high potassium and low sodium. Each 100 grams of lettuce contains 212 mg of potassium and 36.5 mg of sodium. Potassium is an essential element for maintaining human life. It can dilate arteries, reduce peripheral vascular resistance, promote urinary sodium excretion, reduce cardiovascular burden, reduce the thickening of arterial walls in patients with hypertension, and achieve the purpose of lowering blood pressure. People with high blood pressure and arrhythmia often eat raw lettuce, which has significant curative effects.

2. Lettuce is rich in potassium ions, which is 27 times the sodium content, which is beneficial to the balance of water and electrolytes in the body and promotes urination. Lettuce contains more niacin, which can increase milk secretion and is an important part of the diet of pregnant women.

3. Lettuce is rich in fluorine, which can participate in the formation of tooth enamel and dentin, and participate in bone growth. The organic compounds contained in lettuce are rich in iron that can be absorbed by the human body, which is very beneficial to patients with iron deficiency anemia. The iron contained in lettuce is easily absorbed by the human body under the action of organic acids and enzymes. The white sap flowing out of the lettuce stems has a soothing and hypnotic effect and has the function of regulating the nervous system.