Meet Dr. Kathryn Retzler – Founder of HormoneSynergy® Clinic

Dr. Kathryn Retzler is the founder and sole owner of HormoneSynergy® LLC. She has dedicated her life to helping people pursue vibrant health, optimal aging, and longevity through personalized, science-based medicine.

Her mission is simple, but not small: help patients prevent premature decline, support brain health, protect cardiovascular function, restore energy, and live with more purpose as they age.

Dr. Retzler does not view aging as something to fear. She sees it as a process that deserves attention, preparation, and better medicine. With each passing year, she continues to hold herself to higher standards of physical, mental, and spiritual health, and she brings that same expectation of possibility to her patients.

A Mission Rooted in Science, Compassion, and Purpose

Dr. Retzler’s work has always been grounded in the belief that patients deserve more than reactive care. They deserve medicine that looks ahead.

• Purpose: To inspire people to achieve optimal health and longevity through science-based medicine, education, and personalized care.
• Philosophy: Aging well requires a proactive approach that combines advanced diagnostics, balanced hormones, preventive cardiology, brain health, and lifestyle medicine.
• Tools: Knowledge sharing, authentic leadership, evidence-informed therapies, and continual professional growth.

“I believe every person has a unique path to vibrant health and the potential for optimal aging and cognitive wellness.” – Dr. Retzler

Education and Advanced Training

Dr. Retzler’s clinical approach reflects decades of training, mentorship, teaching, and hands-on patient care.

• Doctorate in Naturopathic Medicine, 2001, National College of Naturopathic Medicine, Portland, Oregon
• Internship in integrative medicine with Andrew Weil, MD
• Residency in McMinnville, Oregon
• Fellowships in preventive cardiology under Mark Houston, MD, through the American Academy of Anti-Aging Medicine
• Regular lecturer and teacher at Age Management Medicine Group and international medical conferences

Her mentors include Dr. Rebecca Glaser, Dr. Thierry Hertoghe, Dr. Daniel Amen, and Dr. Dale Bredesen.

Expertise and Clinical Focus

Dr. Retzler’s work brings together the science of aging with the practical needs of real patients. Her clinical focus includes:

• Bioidentical Hormone Replacement Therapy for women and men
• Preventive cardiology and cardiovascular risk reduction
• Longevity medicine and optimal aging
• Functional medicine and lifestyle optimization
• Brain health and cognitive function support
• Age management medicine consulting and physician training

She integrates natural, evidence-informed therapies with bioidentical hormones and, when appropriate, pharmaceuticals to address root causes of dysfunction, hormone imbalances, metabolic changes, cognitive risk, and the physiologic changes associated with aging.

Leadership and Teaching

Dr. Retzler speaks regularly at national and international conferences on topics including age management medicine, hormone health, preventive cardiology, brain health, and women’s health.

She also trains physicians in:

• Age management medicine
• Preventive cardiology
• Bioidentical Hormone Replacement Therapy
• Weight Loss for Longevity™
• Women and aging

Her role as a teacher reflects one of the central themes of her career: better medicine requires better education, both for patients and for clinicians.

Serving Patients in Oregon, Washington, and Beyond

Dr. Retzler holds full prescribing authority in Oregon and Washington. Through HormoneSynergy® Clinic, she serves patients who are seeking a more proactive, personalized approach to health optimization and longevity medicine.

Her work includes:

• Individual health optimization consultations
• Hormone evaluation and treatment planning
• Preventive cardiology assessment
• Brain health and cognitive wellness support
• Training for medical professionals in preventive cardiology, age management, and BHRT protocols

A Vision for Optimal Aging

Through HormoneSynergy® Clinic, Dr. Retzler uses advanced diagnostics, functional medicine principles, hormone expertise, preventive cardiology, and personalized care plans to help patients age with more strength, clarity, and resilience.

Her goal is to help patients:

• Prevent disease before it becomes obvious
• Enhance cognitive function and brain health
• Restore energy, balance, and vitality
• Protect cardiovascular and metabolic health
• Age with purpose, independence, and longevity

At HormoneSynergy®, the goal is not simply to live longer. The goal is to live better, think clearly, stay strong, remain engaged, and protect the capacity to participate fully in life.

Frequently Asked Questions

Who is Dr. Kathryn Retzler?

Dr. Kathryn Retzler is the founder and sole owner of HormoneSynergy® LLC. Her clinical work focuses on longevity medicine, bioidentical hormone optimization, preventive cardiology, brain health, and functional medicine.

What does Dr. Retzler specialize in?

Her areas of focus include bioidentical hormone replacement therapy, preventive cardiology, longevity medicine, functional medicine, brain health, cognitive wellness, and age management medicine.

Where did Dr. Retzler train?

Dr. Retzler earned her doctorate in naturopathic medicine from the National College of Naturopathic Medicine in Portland, Oregon, completed an internship in integrative medicine with Andrew Weil, MD, and completed preventive cardiology fellowships under Mark Houston, MD.

Does Dr. Retzler teach other physicians?

Yes. Dr. Retzler lectures nationally and internationally and trains physicians in age management medicine, preventive cardiology, bioidentical hormone replacement therapy, Weight Loss for Longevity™, and women’s health.

What is Dr. Retzler’s philosophy of aging?

Dr. Retzler believes aging does not have to mean passive decline. Her approach emphasizes prevention, advanced diagnostics, hormone balance, cardiovascular protection, brain health, lifestyle medicine, and purposeful living.

Editorial Transparency

This content was created with AI-assisted drafting support and edited for accuracy, clarity, and brand alignment by the HormoneSynergy® team. Content reflects HormoneSynergy’s educational and clinical perspective and is not a substitute for individualized medical care.