Lettuce leaves can be eaten, moderate consumption of lettuce leaves can provide the body with carbohydrates and other nutrients. Lettuce leaves are more nutritious and non-toxic, safe for the human body, can provide the body with carbohydrates, protein and other nutrients. Every 100 grams of lettuce leaves have 12 calories, of which 2.9 grams of carbohydrates, 1 gram of protein, 0.2 grams of fat, 9 milligrams of calcium, vitamin C38.7 milligrams. Lettuce leaves are low in energy, moderate amount of food will not aggravate the energy burden, not easy to lead to obesity, at the same time can provide water to the body as well as the above nutrients. However, it is not recommended to consume too much lettuce leaves, easy to affect the intake of other nutrients, resulting in nutritional imbalance, as well as triggering nausea, vomiting and other gastrointestinal symptoms. When consuming romaine lettuce leaves, it is recommended to consume them together with other meats, eggs, vegetables and staple foods to ensure balanced nutrition.