Amino acids are not expensive, dozens of dollars can buy a bottle, clinically used mainly for patients just after surgery. Because most patients after surgery can not eat or poor eating, the body is prone to negative nitrogen balance, the body consumption is greater than the body’s ability to intake, this time the use of amino acid liquid, you can supplement the body’s negative nitrogen balance, while more auxiliary sugars, fats and other intake. In addition, for some patients with malignant disease, such as advanced tumor patients, due to the consumption of tumor lesions on the human body, mostly manifested as weakness, poor feeding and other conditions, can be infused with amino acids to supplement the human body consumption, prolonging the patient’s survival time, and strive for treatment opportunities. However, in the process of use, it is still necessary to carry out under the guidance of the doctor, according to the actual situation of the patient, choose the appropriate dose for treatment, to ensure the therapeutic effect.