1, plantain and corn must be boiled in water, which can effectively dredge the intestines, moisten the intestines and relax the bowels, and have diuretic effect. Plantain is cold and corn stigma is flat, both of which are rich in mineral elements, which can promote the discharge of liquid well.

2. Plantago is also rich in carotene, vitamin A and so on. It can prevent night blindness, promote the transformation of rhodopsin, and has the effects of improving eyesight, caring skin, calming the liver and benefiting the gallbladder.

3. Both of them can effectively lower blood pressure, lower blood sugar, relieve cough and stimulate appetite through boiling water, so they can be well improved.