Dr. Retzler's Longevity Blog

SECA vs InBody: Why accuracy matters. At HormoneSynergy® Clinic in Portland & Lake Oswego, we offer SECA Body Composition Testing for just $50 (scan + interpretation). Get precise insights into fat, muscle, hydration, visceral fat, and metabolism—better than InBody, trusted by physicians.

At HormoneSynergy® Clinic and RetzlerRx®, we know that nutrition is one of the most powerful drivers of health and longevity. Many of our patients struggle with preparing balanced meals, often turning to fast food or processed options due to busy schedules. That’s why we proudly support MyFitFoods® Lake Oswego, a local business making it easier to enjoy fresh, convenient, and nutrient-rich meals. Together, we share a mission to help the Portland and Lake Oswego community make smarter food choices that support energy, vitality, and lifelong wellness.

Discover the power of RetzlerRx® collagen peptides for the whole body with Fortigel®, Fortibone®, and Verisol®—clinically studied to support joints, bones, and skin. Available now at HormoneSynergy® Clinic in Portland & Lake Oswego.

Dr. Kathryn Retzler of HormoneSynergy® Clinic recommends Arterosil®, Vascanox®, and Cartigenix® from Calroy Health Sciences to support cardiovascular health, circulation, and joint longevity. Learn why these clinically researched formulas are central to her Longevity Medical Practice in Portland and Lake Oswego.

Reversing metabolic syndrome is essential for preventing diabetes, heart disease, and other chronic conditions. At HormoneSynergy® Clinic in Portland & Lake Oswego, we use advanced testing, lifestyle medicine, and physician-guided programs to help restore insulin sensitivity, improve cardiovascular health, and extend your healthspan with evidence-based, personalized care.

Discover how HormoneSynergy® Clinic in Portland & Lake Oswego uses functional medicine, preventive cardiology, BHRT, weight loss programs, and advanced diagnostics to help you live longer—and healthier. Learn the difference between healthspan and lifespan and how to maximize both.

A groundbreaking study reveals that daily movement patterns—not age, smoking, or chronic illness—are the top predictor of longevity. At HormoneSynergy® Clinic in Portland & Lake Oswego, OR, Dr. Kathryn Retzler integrates this science into personalized longevity medicine programs, helping you add years to your life with simple, sustainable lifestyle changes.

Thinking about rapamycin for longevity? At HormoneSynergy® in Portland & Lake Oswego, Dr. Kathryn Retzler explains why fixing blood sugar, weight, and heart health comes first before exploring medications like rapamycin. Discover the proven benefits of lifestyle medicine, advanced testing, and personalized care to build a strong health foundation before adding advanced longevity options.

Considering a full-body MRI scan like Prenuvo® in Portland or Lake Oswego? Learn the pros, cons, and costs before investing in preventive imaging. Discover why longevity medicine focuses on targeted, evidence-based screenings for early detection, rather than routine whole-body imaging, to help you live a longer, healthier life.

Meet Dr. Kathryn Retzler, founder of HormoneSynergy® Clinic and a leader in longevity medicine, preventive cardiology, and bioidentical hormone therapy (BHRT). With advanced training, evidence-based care, and a passion for optimal aging, Dr. Retzler helps patients achieve vibrant health, energy, and longevity at every stage of life.

Discover Cleerly® Heart Testing by Dr. Retzler in Portland & Lake Oswego—advanced preventive cardiology for heart health & longevity medicine in Oregon.