At Vitality Clinic, Dr. Ismail Mualin poses a double threat to illness—namely his dual board certifications in internal medicine and obesity medicine. Since many common ailments—such as heart problems and diabetes—stem directly from weight issues, Dr. Mualin often starts there, outlining weight-loss programs personalized to the results of body-composition tests and patients’ favorite vice presidents. In addition to helping patients maintain healthy weights, Dr. Mualin and the team administer medical checkups and complete physical exams.