Functional Medicine

From The Institute for 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 spend time with their patients, listening to their histories and looking at the interactions among genetic, environmental, and lifestyle factors that can influence long-term health and complex, chronic disease. In this way, Functional Medicine supports the unique expression of health and vitality for each individual. – See more at:

Primary Care Internal & Functional Medicine with Dr Sarah Zielsdorf, MD, MS

Dr. Sarah Zielsdorf hails from Ohio, where she received her BA in Microbiology from Miami University with a minor in molecular biology and a concentration in oboe performance.  She went on to earn an MS in Public Health Microbiology and Emerging Infectious Diseases from The George Washington University in Washington, D.C. where she published her thesis on improving laboratory emergency preparedness post 9/11.  Dr. Zielsdorf graduated from Loyola University Chicago Stritch School of Medicine and completed her residency in Internal Medicine at Loyola University Medical Center and Edward Hines, Jr. VA Hospital. She holds a membership in the Institute for Functional Medicine and is board certified in Internal Medicine.

Dr. Zielsdorf’s goal is to empower patients to reverse chronic disease through a combination of nutrition and science-based, 21 century treatment approaches.  Her ideal patients are committed to taking responsibility for their health and are passionate partners in the healing journey.  Dr. Zielsdorf will take
the time to listen to your story to get to the root cause of your concerns in a patient-centered, personalized way.  She understands that every individual is biochemically and genetically unique.  Dr. Zielsdorf supports the innate ability of the body and mind to heal, restoring optimized health.  Above all, she values the transformative power of the patient-physician relationship.  Health is not simply the absence of disease, but is living a life of passionate vitality.

Roxana Calafos, FNP, Nurse Practitioner

Roxana Calafos is a Family Nurse Practitioner with more than 18 years of nursing experience.  She attended Pensacola Christian College and obtained her Bachelor’s Degree with a major in Nursing.   While working as a Registered Nurse at Edward Hospital, she began pursuing her graduate studies to become a Family Nurse Practitioner.
Since becoming a Board Certified Family Nurse Practitioner in 2015, she has worked in the walk-in clinic setting seeing a wide range of patients for emergent, non-life-threatening illnesses. She became passionate in functional medicine when she realized most of the patients she was seeing were not living healthy lives, were becoming ill frequently and relied heavily on antibiotics.

She is excited to work in the role of Functional Medicine Nurse Practitioner alongside Dr. Sarah Zielsdorf to improve the quality of life for her patients.  She is committed to life-long learning and is pursuing certification in Functional Medicine via the Institute for Functional Medicine.
Her interests include nutrition, adjuncts to cancer treatment and working with the pediatric population.