California Center for Functional Medicine | Chris Kresser

California Center for Functional Medicine

Experience Chris Kresser’s unique evidence-based approach as a patient at the California Center for Functional Medicine.


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Welcome to the California Center for Functional Medicine.

Helping More People Prevent and Reverse Chronic Illness

Thousands of people have experienced Chris Kresser’s unique approach to diagnosing and reversing the underlying causes of chronic conditions. But, as a lone practitioner Chris could not meet the growing demand and faced an ever longer waiting list.

Chris partnered with Dr. Sunjya Schweig to form the California Center for Functional Medicine. They quickly hired a third clinician, Dr. Amy Nett, whom Chris specifically trained in his method. Dr. Ramzi Asfour, an infectious disease specialist practicing functional medicine, joined CCFM in April 2016. Tracey O’Shea, our nurse practitioner, and Danielle Cook-Kawash, our nutritionist and health coach, began helping our patients in early 2017.


Accelerate your healing with Chris Kresser’s unique approach.

Tracey O’Shea, FNP-C., Kresser Staff Clinician

Tracey O'SheaTracey O’Shea is a licensed Family Nurse Practitioner (FNP-C) who graduated from Samuel Merritt University with a Master’s degree in Nursing. She became board certified through the American Association of Nurse Practitioners and was first introduced to Functional Medicine in 2013, when she began her journey through the Institute for Functional Medicine’s certification program. She has trained with the Kresser Institute (ADAPT) program and is an IFM Certified Practitioner.

Tracey chose to become a nurse practitioner because it provided her the opportunity to help patients gain control of their health and become active participants in life. Seeing people enjoy every aspect of their health is rewarding. Studying and practicing functional medicine has given her additional tools to ensure that patients get the individualized, comprehensive treatment they deserve.

Tracey finds that communication is key for all successful and sustainable relationships. She tries to emphasize this with her patients during the first encounter, so that they understand what makes functional medicine different than conventional medicine. She listens carefully to the patient, especially as they discuss their needs and how they fit into a comprehensive, individualized health plan. Tracey hopes that she gives her patients motivation to live healthier, more fulfilling lives. Her goal is to help them understand the pivotal role they themselves play in designing and carrying out their treatment plan for health optimization. She is grateful for the opportunity to work with the California Center for Functional Medicine and is honored to be part of this journey.

Learn more about Tracey O’ Shea How to become a patient

Chris Kresser, L. Ac.

Chris KresserChris Kresser, M.S., L.Ac. is a globally recognized leader in the fields of ancestral health, Paleo nutrition, and functional and integrative medicine. He is the creator of ChrisKresser.com, one of the top 25 natural health sites in the world, and the author of the New York Times best seller, The Paleo Cure.

Chris has been studying, practicing, and teaching alternative medicine for more than fifteen years. He did his undergraduate work at UC Berkeley, and studied Chinese and integrative medicine at the Acupuncture & Integrative Medicine College, also in Berkeley. He has trained with world-renowned healers and educators in a variety of disciplines throughout the U.S., Thailand, and Indonesia.

Chris teaches and practices functional medicine, a personalized approach to health care that recognizes the biological uniqueness of each patient. In contrast to conventional care, which is almost entirely focused on suppressing symptoms, functional medicine eliminates symptoms by addressing the underlying cause of a problem. It is an evidence-based field of health care that views the body as an interconnected whole, and recognizes the importance of these connections in health and disease.

Learn more about Chris Kresser How to become a patient