· Guide  · 2 min read

Welcome to Onix: Dr. Jill Carnahan

Functional medicine pioneer, Loyola-trained physician, and cancer survivor. Dr. Carnahan brings a perspective to chronic disease that no textbook can teach.

Functional medicine pioneer, Loyola-trained physician, and cancer survivor. Dr. Carnahan brings a perspective to chronic disease that no textbook can teach.

We are thrilled to welcome Dr. Jill Carnahan to Onix.

Dr. Jill Carnahan, MD is a Loyola University-trained physician, a functional medicine pioneer, and one of the most compelling voices in the movement to find the root cause of chronic illness, a mission born as much from her own survival as from her science.

That personal reckoning changed everything. As a survivor of breast cancer, Crohn’s disease, and toxic mold illness, she brings a perspective to complex chronic disease that no textbook can teach. She earned her medical degree from Loyola University Stritch School of Medicine, completed her residency at the University of Illinois in Family Medicine, and became dually board certified in both Family Medicine and Integrative Holistic Medicine.

She founded the Methodist Center for Integrative Medicine in 2009, then launched Flatiron Functional Medicine in Boulder, Colorado, now one of the most sought-after functional medicine practices in the country. She co-authored the Personalized and Precision Integrative Cardiovascular Medicine textbook and released her book Unexpected: Finding Resilience through Functional Medicine, Science, and Faith. She has been featured in People, Forbes, Shape, and on NBC News.

Most doctors are trained to manage disease, not resolve it. Functional medicine asks a different question: why is this happening in the first place? Onix lets me bring that root-cause thinking directly to people who’ve been searching for answers for years, and finally give them a real path forward.

— Dr. Jill Carnahan

What Her Guide Does on Onix

Help people uncover the root causes of chronic illness, from mold toxicity and gut dysfunction to autoimmunity, hormonal imbalance, and environmental triggers, with personalized guidance grounded in cutting-edge functional lab testing, integrative protocols, and two decades of clinical experience.

Back to Insights

Related Posts

View All Posts »
Welcome to Onix: Dr. Jeffrey Bland

Welcome to Onix: Dr. Jeffrey Bland

Biochemist, nutritional medicine pioneer, and the father of functional medicine. The man who changed how the world thinks about chronic disease.

Welcome to Onix: Dr. Dave Rabin

Welcome to Onix: Dr. Dave Rabin

Translational neuroscientist, board-certified psychiatrist, and inventor of the Apollo wearable. Dr. Rabin built a device that teaches the nervous system to feel safe.

Welcome to Onix: Dr. Jordan Metzl

Welcome to Onix: Dr. Jordan Metzl

Renowned sports medicine physician, bestselling author, and 15-time Ironman finisher. The doctor who prescribes exercise as medicine.