Leeks can not be eaten with soy milk, if soy milk and leeks are eaten together, it will generate a kind of indigestible calcium oxalate, if the stomach gathered a large amount of calcium oxalate, there will be diarrhea or want to vomit clinical phenomenon. The main nutrients of leeks are vitamin C, vitamin B1, vitamin B2, niacin, carotene, carbohydrates and minerals. Leeks are also rich in fiber, every 100 grams of leeks containing 1.5 grams of fiber, higher than scallions and celery, can promote intestinal peristalsis, the prevention of colorectal cancer, while reducing the absorption of cholesterol, play a role in the prevention and treatment of atherosclerosis, coronary heart disease and other diseases.