Lettuce leaves are generally not harmful, moderate consumption of the opposite is beneficial to the human body, lettuce leaves can provide the body with carbohydrates and other nutrients needed by the body, but long-term overconsumption, may produce indigestion and other discomforts. Lettuce leaves is a nutritious vegetable, every 100g lettuce leaves mainly contain protein 1.4g, vitamin C13mg, potassium 148mg, sodium 39.1mg and other nutrients, are the nutrients needed by the body, moderate eating will not harm the human body, but to supplement the human body nutrients, to maintain the normal physiological function of the body. Lettuce leaves should not be consumed in excess for a long period of time, if consumed in excess for a long period of time may cause discomfort to the gastrointestinal tract, diarrhea, bloating and other symptoms of indigestion. In addition, if the people who are allergic to lettuce leaves should be prohibited from eating to avoid allergic reactions. Lettuce leaves can also be consumed together with other vegetables and fruits to ensure a balanced diet.