Your first consultation at a weight loss center will be a time for the doctor to get to know you and understand your specific situation. Your consultation will consist of questions about your medical history and health, your lifestyle, and your exercise routine, and they will determine your body mass index or BMI.   The doctor will then design a weight loss program to fit your needs. Some people may deal with multiple chronic conditions and others may have physical limitations; some will be on medications that affect how they can lose weight. Every person is different, so a personalized program will work best.   Weight loss centers vary in their approach to weight loss. Some will focus on low-calorie diets or meal replacements with the supervision of a doctor. Others might focus on guiding you through a gradual weight loss using dietary changes and exercise to reach your goal. It will depend on the factor that they discussed with you in your consultation.