Holly Deffert, RN is a Colorado native, lifelong student of medicine, and founder of Hygeia-a regenerative wellness practice rooted in cellular optimization and foundational healing.
Holly Deffert, RN
Holly Deffert, RN is a Colorado native, lifelong student of medicine, and founder of Hygeia-a regenerative wellness practice rooted in cellular optimization and foundational healing.
With over 14 years of experience working in the Emergency Room, Holly witnessed firsthand the strengths-and the limitations-of conventional medicine. While emergency care saves lives, she became increasingly aware that true vitality is not created in crisis. It is built daily through prevention, detoxification, nutrient sufficiency, and mitochondrial support.
That realization changed everything.
Holly stepped away from the traditional hospital model to pursue advanced training in functional, integrative, and regenerative modalities. She has trained extensively in medical ozone therapy, UV light therapy (O3UV), high-dose vitamin C, Poly-MVA, detox protocols, and foundational cellular support. She also trains nurses and physicians in ozone administration through SOPMed.
The body is intelligent.
The body is designed to heal.
But it must be supported correctly.
At Hygeia, Holly focuses on restoring terrain-optimizing detox pathways, rebuilding mitochondrial function, strengthening immune resilience, and supporting the body at the cellular level. Her approach integrates structured detox, therapeutic ozone, targeted IV nutrient therapy, gut restoration, and personalized wellness planning.
She does not chase symptoms.
She works at the root.
Holly is especially passionate about ozone therapy as a powerful tool for immune modulation, oxygen utilization, and systemic regeneration. In a world where immune systems are constantly challenged, she believes that cellular optimization is no longer optional-it is foundational.
Her mission is to educate, empower, and guide individuals toward sovereignty in their health. Every client is met with precision, compassion, and a deep respect for the body’s innate intelligence.
Wherever you are in your healing journey, Hygeia exists to help you rebuild from the cell up.
Stefany Carstensen, NP
My approach with patients is patient centered and compassionate. My goal is to partner with you, and to offer you tools, education and support so that you can feel and be your very best.
I became a Nurse over 20 years ago, and initially, I worked in the inpatient hospital setting, in a variety of settings including oncology, Bone Marrow Transplant, ICU, Labor and Delivery and a Medical Surgical unit. I rapidly became frustrated by the fact that so many of the patients I cared for struggled with chronic diseases that were often related to choices in diet and lifestyle. Additionally, the traditional Western medical system was not focused on healing, it seemed focused on treating symptoms without actually improving patient health. After I became a Nurse Practitioner in 2008, I dedicated my practice to helping patients improve their lifestyles and nutritional approaches, while working to empower patients with education and supportive self care strategies.
My approach with patients is patient centered and compassionate. My goal is to partner with you, and to offer you tools, education and support so that you can feel and be your very best. I utilize Functional Medicine principles in order to truly get to the root cause of your symptoms, and together, we will develop a comprehensive treatment plan that is effective, manageable and focused not just on treating your symptoms but on restoring balance to your body.
I graduated from the University of Colorado College of Nursing with a Bachelor’s Degree of Science in Nursing in 2000. I returned to school a few years later, and graduated from my alma mater with a Master’s Degree in Nursing in 2008 and became Board Certified as a Family Nurse Practitioner. Finally, out of a desire to deepen my own spiritual and yoga practice, I completed a 200-hour Yoga Teacher Training with Whole Yoga in Denver Colorado in 2013. Additionally, I have continued my education in the fields of Integrative Medicine and Functional Medicine with the Institute of Functional Medicine on an ongoing basis and have the honor of being granted the designation of Institute for Functional Medicine Certified Practitioner (IFMCP) in December 2019.
Book a free 15-minute clarity call
Not sure where to start? Holly will listen to your goals and point you in the right direction.