The effects of green vegetables are as follows: 1, can prevent the occurrence of constipation, in reducing the incidence of colorectal cancer is also very obvious, because the green vegetables are rich in dietary fiber, can mechanically stimulate intestinal peristalsis, promote the discharge of stools, reduce the intestinal tract in the harmful substances and the intestinal wall in contact with the area and time, there is a very good prevention of constipation, reduce the incidence of colorectal cancer role. 2, rich in minerals, such as potassium, magnesium, phosphorus, these minerals for the body metabolic regulation is very obvious. For example, potassium, magnesium, phosphorus, these minerals for the body metabolism regulation role is very obvious. Green vegetables with too much is not good, especially for patients with gastric problems do not eat too much, easy to appear chronic diarrhea or cold will appear after bloating, abdominal pain, diarrhea, in the cooking mode of attention, be sure not to eat raw.