First, a rigorous medical and psychological screening process, performed by a team of healthcare professionals, will determine if you are a candidate. This process helps to identify the aspects of your health that will improve following treatment, as well as the aspects that may increase the risks associated with surgery.
You will also want to come to a complete understanding of the significant, lifelong, lifestyle changes you must commit to, including diet, exercise, limiting alcoholic intake and smoking cessation, if necessary.