1. Lettuce belongs to the genus Lettuce in Compositae and is an annual or biennial herb. Also called lettuce, lettuce, lettuce. Lettuce is low in carbohydrate and rich in inorganic salts and vitamins, especially nicotinic acid.

2, because it tastes fresh and bitter, it can stimulate the secretion of digestive enzymes and increase appetite. A large amount of cellulose contained in lettuce can promote human intestinal peristalsis, prevent constipation, and play the role of clearing intestine, losing weight and slimming. Chinese medicine believes that lettuce has the functions of moistening hair, diuresis and lactation.