Practical Application and Evaluation of Fortimel in Oncology Patients

In this study, patients will be provided with ONS preparation (4 kinds of ready-to-drink special medical food) free of charge during the treatment period. Doctors will provide patients with different flavor nutritional preparations on a weekly basis, 2 bottles per day for patients with 1 flavor per week, and 14 bottles per day for each of 4 flavors at the recommended dosage of 400 kcal per day 28 days