Electrodermal Screening (EDS) offers the most cost effective method to evaluate patients on a routine basis. Dr. Voll's method also offers a great learning method for the approach to pathophysiology and functional medicine. Functional medicine addresses the underlying causes of disease, using a systems-oriented approach and engaging both patient and practitioner in a therapeutic partnership. It is an evolution in the practice of medicine that better addresses the healthcare needs of the 21st century. By shifting the traditional disease-centered focus of medical practice to a more patient-centered approach, functional medicine addresses the whole person, not just an isolated set of symptoms. Functional medicine practitioners using EDS need not to spend extensive time with their patients, but listening to their histories and looking at the interactions among genetic, environmental, and lifestyle factors that EDS brings forth, can influence long-term health and complex, chronic disease. In this way, functional medicine with EDS supports the unique expression of health and vitality for each individual.