1, lettuce is a high potassium and low sodium vegetables, can expand blood vessels, promote urinary sodium excretion, lower blood pressure, and play a role in the prevention and treatment of hypertension and heart disease; contains fluorine, calcium, iron and other minerals, not only to protect the health of the teeth, but also promote the growth of the teeth, iron deficiency anemia has a very good prevention and treatment; lettuce also contains dietary fiber, can increase the sense of satiety, can play a wide bowel laxative, weight loss, and slimming effect; lettuce contains niacin and sugar is also very low. The effect of slimming; lettuce contains niacin and sugar content is also very low, very suitable for diabetics to eat.

2, lettuce contraindications; lettuce cool, so the spleen and stomach cold, loose diarrhea is not suitable for consumption. During women's menstruation, as well as cold dysmenorrhea crowd is not suitable for eating lettuce. Lettuce is a cool vegetable, so it should not be consumed in large quantities for a long time, so as not to cause discomfort.

3, lettuce is rich in nutrients, containing protein, a variety of vitamins and minerals can supplement the body's nutritional requirements, enhance the body's resistance and physical strength; also rich in iron, for iron deficiency anemia is very good; lettuce is also rich in plant fibers, you can promote intestinal peristalsis, to help digestion, prevention of constipation is a healthy and beneficial vegetables.