RetzlerRx® Longevity Supplements

At HormoneSynergy®, supplements are organized around key physiological systems that influence long-term health, resilience, and healthy aging. Dr. Kathryn Retzler uses supplements within a broader physician-guided framework that may also include advanced lab interpretation, body composition analysis, hormone evaluation, metabolic assessment, preventive cardiology, sleep optimization, and lifestyle strategy.

This page is designed to help visitors browse supplements in a way that makes more clinical sense. Instead of focusing only on ingredients, we organize formulas around the physiological patterns people are often trying to support in longevity medicine: metabolic health, sleep and recovery, cardiovascular health, brain health, and hormone-related physiology.

When Supplements Make Sense

Supplements can make sense when they are used to support a clearly identified physiological need rather than as a substitute for real medical thinking. In longevity medicine, that might include situations where lab patterns, diet quality, medication effects, sleep disruption, training demands, digestive issues, hormone-related shifts, inflammatory burden, aging physiology, or recovery needs create gaps that nutrition alone may not fully address.

They may also be useful when a person is actively working on larger goals such as improving metabolic health, supporting sleep quality, protecting cardiovascular function, preserving muscle and cognition with age, or improving resilience during periods of stress or physiologic change. In that context, supplements are not the whole plan. They are one tool inside a larger strategy.

How We Choose Supplements

We do not build supplement recommendations around hype, trend cycles, influencer marketing, or massive ingredient lists designed to look impressive on a label. We look for quality manufacturing, clinically relevant ingredient forms, thoughtful formulation, appropriate dosing, and products that fit a real clinical use case.

That includes physician-vetted formulas, cGMP-compliant manufacturing standards, branded ingredients when they meaningfully improve absorption or formulation quality, and products that make sense inside a broader preventive and longevity framework. We also pay attention to whether a supplement is realistic for long-term use, whether the formulation is redundant with other products, and whether it fits the physiology we are actually trying to support.

What Supplements Can Do

Supplements can support physiology. They can help fill nutritional gaps, improve the quality of a broader plan, and make it easier to target specific pathways such as methylation, omega-3 status, mitochondrial energy, nitric oxide biology, sleep support, microbiome balance, or cardiometabolic resilience.

What Supplements Cannot Do (Please read)

What they cannot do is replace medical judgment, erase the effects of poor sleep and chronic stress, overcome a persistently unhealthy diet, reverse advanced disease on their own, or serve as a shortcut around the basics.

They are not magic, and they are not a substitute for diagnostics, physician guidance, or meaningful behavior change. Used appropriately, they can be helpful. Used carelessly, they often become expensive noise.

Metabolic Health

Best for: visitors focused on insulin resistance, body composition, energy production, inflammatory balance, digestive-metabolic support, and broader cardiometabolic resilience.

This section focuses on supplements commonly used to support metabolic resilience, body composition goals, glucose and insulin-related physiology, mitochondrial energy, digestive function related to metabolism, inflammatory balance, and nutritional foundations that often intersect with cardiometabolic health.

• RetzlerRx® Cholest Protect — designed to support healthy cholesterol metabolism, lipid balance, and overall cardiometabolic wellness.*
• RetzlerRx® Synergy NR — nicotinamide riboside support for cellular energy, mitochondrial resilience, and healthy aging pathways.*
• RetzlerRx® CoQ10 100 mg — foundational coenzyme Q10 support for mitochondrial energy and cellular vitality.*
• RetzlerRx® CoQ10 200 mg — higher-potency CoQ10 support for energy production and healthy aging.*
• RetzlerRx® Creatine Monohydrate Powder — supports strength, training capacity, cellular energy, and cognitive performance.*
• RetzlerRx® AnabolX Amino Acid Complex — essential amino acid support for strength, recovery, and lean mass preservation.*
• RetzlerRx® Probiotic Synergy Control — targeted microbiome support for digestive balance, immune resilience, and healthy body composition.*
• RetzlerRx® UltraFiber Synergy — soluble fiber support for bowel regularity, satiety, and gut wellness.*
• RetzlerRx® Digestive Enzymes — digestive support for nutrient breakdown, comfort, and assimilation.*
• RetzlerRx® Metabolic Recovery Formula GHI Vanilla — physician-formulated vegan protein blend designed to support gastrointestinal function and balanced metabolic recovery.*
• RetzlerRx® Metabolic Recovery Formula GHI Chai — physician-formulated vegan protein blend designed to support GI health, liver detox pathways, and metabolic support.*
• RetzlerRx® Curcumin C3 Complex® with BioPerine® — supports inflammatory balance, recovery, antioxidant defense, and metabolic resilience.*

For a broader clinical view of metabolic optimization, also explore Weight Loss for Longevity and Insulin Resistance Explained.

Sleep & Recovery

Best for: visitors looking for support with sleep quality, stress physiology, nervous system balance, post-training recovery, and overall resilience.

Sleep and recovery are central to healthy aging. This category includes formulas used to support relaxation, circadian rhythm, calm focus, nervous system balance, tissue recovery, training recovery, and restorative sleep quality.

• RetzlerRx® Relax Synergy Cherry — supports relaxation, stress resilience, and healthy sleep quality.*
• RetzlerRx® Relax Synergy Plain — unflavored calming support for stress physiology, relaxation, and sleep routines.*
• RetzlerRx® Stress Resolve — natural stress relief and calm focus support.*
• RetzlerRx® Brain Calm ES — supports calm focus, emotional balance, and healthy stress response.*
• RetzlerRx® L-Theanine — supports calm focus, stress resilience, and relaxed mental clarity.*
• RetzlerRx® 5-HTP Sustained Release — serotonin precursor support for mood balance, relaxation, and sleep support.*
• Magnesium L-Threonate Powder with Magtein® Unflavored — supports cognitive performance, relaxation, and healthy sleep cycles.*
• RetzlerRx® Magnesium L-Threonate Powder with Magtein® — brain-focused magnesium support for memory, focus, relaxation, and sleep quality.*
• Alpha Theta Ultra PM — supplies nutrients recognized to support calming brainwave activity and high-quality sleep.*
• Ashwagandha with Shoden® — premium adaptogen support standardized to 35% withanolide glycosides.*
• Metasleep™ by Metagenics® — dual-phase melatonin with additional calming support to help promote sleep onset and sleep maintenance.*
• RetzlerRx® Synergy SPM's — Specialized Pro-Resolving Mediator support for inflammation resolution, tissue recovery, and long-term cellular health.*
• RetzlerRx® Collagen Peptides — collagen peptide support for joints, connective tissue, bone, and healthy aging recovery.*
• RetzlerRx® SynergyGenPro Collagen + HA Bulk Powder — advanced collagen complex designed to support joint health, tendon resilience, mobility, and skin vitality.*

Related reading: Sleep and Hormone Balance.

Cardiovascular

Best for: visitors focused on lipids, vascular health, circulation, omega-3 support, nitric oxide physiology, endothelial function, and prevention-oriented heart health.

These formulas support cardiovascular physiology, vascular function, nitric oxide biology, lipid balance, endothelial health, inflammatory resolution, calcium handling, and broader preventive cardiometabolic strategy.

• RetzlerRx® Pure Omega 650 EC with MaxSimil® — enteric-coated omega-3 support for cardiovascular wellness, brain function, and joint comfort.*
• RetzlerRx® Pure Omega 1300 EC with MaxSimil® 60 ct. — enteric-coated omega-3 support for cardiovascular wellness, brain function, and joint comfort.*
• RetzlerRx® Pure Omega 1300 EC with MaxSimil® 120 ct. — enteric-coated omega-3 support for cardiovascular wellness, brain function, and joint comfort.*
• RetzlerRx® OmegaSynergy EPA-DHA 1000 — concentrated EPA and DHA support for cardiovascular, cognitive, and inflammatory balance.*
• RetzlerRx® MaxSimil® Fish Oil — clinician-selected omega-3 support with enhanced absorption technology.*
• RetzlerRx® OmegaPure 900 EC — enteric-coated omega-3 support for recovery, joint comfort, and systemic balance.*
• RetzlerRx® CoQ10 100 mg — foundational coenzyme Q10 support for mitochondrial energy and cardiovascular wellness.*
• RetzlerRx® CoQ10 200 mg — higher-potency CoQ10 support for cellular vitality, energy production, and healthy aging.*
• Vascanox HP — nitric oxide support for vascular wellness and healthy circulation.*
• Arterosil HP® — arterial health support designed to help maintain the endothelial glycocalyx.*
• RetzlerRx® Cholest Protect — designed to support healthy cholesterol metabolism, lipid balance, and overall cardiometabolic wellness.*
• RetzlerRx® Vitamin K2 180 mcg with MenaQ7® PRO — supports calcium metabolism, vascular health, and bone physiology.*
• RetzlerRx® Vitamin D3 5000 + K2 — combines vitamin D3 and vitamin K2 to support bone health, heart health, and immune function.*
• RetzlerRx® Synergy SPM's — next-generation Specialized Pro-Resolving Mediator support for inflammation resolution, tissue recovery, and long-term cellular health.*

To learn more about the clinical model behind these recommendations, explore HormoneSynergy® Longevity Medicine.

Brain

Best for: visitors interested in memory, focus, calm alertness, stress resilience, methylation support, and long-term cognitive health.

Brain health is closely tied to metabolic function, inflammation, sleep quality, nutrient sufficiency, and hormone status. These physician-selected formulas support memory, focus, calm alertness, neurological function, methylation, and long-term cognitive resilience.

• RetzlerRx® Magnesium L-Threonate Powder with Magtein® — brain-focused magnesium support for memory, focus, relaxation, and sleep quality.*
• RetzlerRx® L-Theanine — supports calm focus, stress resilience, and relaxed mental clarity.*
• RetzlerRx® B-Active Complex — activated B-vitamin support for methylation, neurological health, mood, and energy metabolism.*
• RetzlerRx® 5-MTHF Active Folate with B12 — targeted methylation and neurologic support with active folate and methylcobalamin.*
• RetzlerRx® Methyl B-12 Synergy Plus — high-potency B12 and folate support with methylcobalamin and Quatrefolic®.*
• RetzlerRx® Creatine Monohydrate Powder — supports strength, training capacity, cellular energy, and cognitive performance.*
• BDNF Essentials® — neurological health and cognitive support formula.*
• CogniCare® by Researched Nutritionals® — cognitive performance support formula.*
• RetzlerRx® Synergy SPM's — Specialized Pro-Resolving Mediator support for inflammation resolution, tissue recovery, and long-term cellular health.*
• Researched Nutritionals® Supplement Collection — clinician-curated formulas supporting immune function, cellular energy, detoxification, gut health, and overall wellness.*

Related reading: Inflammation and Cognitive Aging.

Hormones

Best for: visitors looking for support related to estrogen metabolism, methylation, adrenal resilience, nutrient sufficiency, detox support, and hormone-related physiology in both women and men.

This section includes formulas commonly used to support hormone-related physiology, methylation, estrogen metabolism, adrenal resilience, nutrient foundations relevant to endocrine function, and the broader biochemical terrain that often matters in hormone optimization for both women and men.

• RetzlerRx® 5-MTHF Active Folate — active folate support for methylation, homocysteine balance, and cellular function.*
• RetzlerRx® Methyl B Synergy — activated B-vitamin support with methylfolate and methylcobalamin.*
• RetzlerRx® B Active Complex — practitioner-grade vitamin B support for cellular energy, focus, and metabolic wellness.*
• RetzlerRx® 5-MTHF Active Folate with B12 — activated methylation support for energy metabolism, neurological health, and healthy aging.*
• RetzlerRx® Methyl B-12 Synergy Plus — high-potency B12 and folate support with methylcobalamin and Quatrefolic®.*
• RetzlerRx® Estro Protect DIM — supports healthy estrogen metabolism, hormone balance, and natural detoxification.*
• XYMOGEN® Hormone Protect® — premium hormone balance support.*
• RetzlerRx® PhytoSynergy Multi No Iron — comprehensive multivitamin and phytonutrient support without supplemental iron.*
• RetzlerRx® Vitamin D3 5000 + K2 — combines vitamin D3 and vitamin K2 to support bone health, immune function, and foundational physiology.*
• RetzlerRx® Vitamin D3 2000 IU — daily vitamin D support for immune, bone, and foundational wellness.*
• RetzlerRx® Zinc Glycinate — physician-formulated zinc support for immune resilience, skin health, and cellular wellness.*
• RetzlerRx® Iron Glycinate 29 mg — physician-formulated iron support for healthy iron status, oxygen transport, and energy metabolism.*
• RetzlerRx® NAC — supports glutathione production, antioxidant defense, and phase II detoxification pathways.*
• RetzlerRx® Patented S-Acetyl Glutathione — targeted glutathione support for cellular antioxidant defense and detoxification pathways.*
• RetzlerRx® S-Acetyl Glutathione ULTRA with NAC — advanced glutathione support for oxidative stress balance, cellular defense, and detoxification support.*
• RetzlerRx® Breast Protect — women’s wellness support with targeted nutrient and botanical ingredients.*
• RetzlerRx® Synergy Prostate Plus — targeted men’s health support for prostate comfort and urinary wellness.*

Why RetzlerRx®?

RetzlerRx® is built around the standards we use in real clinical practice. Every formula is practitioner-vetted, uses clinically relevant ingredient forms and dosing, and is selected to support metabolic, cardiovascular, cognitive, recovery, and hormone-related physiology within a broader longevity medicine framework.

Our supplements are manufactured in cGMP-compliant, FDA-registered and inspected facilities, often through NSF-certified manufacturers when appropriate, to support quality, consistency, and trust. This is not random supplement retail. It is a physician-guided, curated system designed to support Evidence-Based Preventive Longevity Medicine.

Supplements Are Only One Part of Longevity Medicine

To learn more about the larger care model behind these recommendations, explore HormoneSynergy® Longevity Medicine, our Weight Loss for Longevity page, and our broader longevity medicine blog.

Professional Supplement Brands Recommended by Dr. Kathryn Retzler

In addition to our physician-formulated RetzlerRx® supplements, Dr. Kathryn Retzler also recommends several trusted professional supplement brands and physician portals used in functional medicine, preventive care, and longevity medicine. These include select clinical partners, practitioner-trusted manufacturers, and specialized supplement access portals that complement the broader HormoneSynergy® Longevity Medicine system.

Ready to Shop or Learn More?

If you are looking for doctor-recommended supplements, physician-grade supplement options, or a more medically responsible approach to healthy aging support, RetzlerRx® is designed to function as both a supplement destination and an entry point into the larger HormoneSynergy® Longevity Medicine system.

Frequently Asked Questions

What are RetzlerRx® Longevity Supplements?

RetzlerRx® Longevity Supplements are practitioner-selected formulas organized around major physiological systems commonly addressed in longevity medicine, including metabolic health, sleep and recovery, cardiovascular health, brain function, and hormone-related physiology.

Are RetzlerRx® supplements doctor recommended?

Yes. These supplements are selected within a physician-guided framework shaped by Dr. Kathryn Retzler’s approach to Evidence-Based Preventive Longevity Medicine.

Why organize supplements by physiology instead of by ingredient?

Organizing supplements by physiology makes the page more clinically useful. It helps people understand how formulas may fit into broader health goals rather than treating supplements like isolated products without context.

When do supplements make the most sense?

Supplements make the most sense when they support an identified need or larger strategy, such as metabolic optimization, sleep support, recovery, cardiovascular protection, cognitive resilience, or hormone-related physiology.

What can supplements realistically do?

They can help support physiology, improve nutritional foundations, and strengthen a broader plan. They cannot replace medical care, overcome poor lifestyle habits on their own, or function as miracle solutions.

How does HormoneSynergy® choose supplements?

We look for quality manufacturing, clinically relevant ingredient forms, thoughtful dosing, and products that fit a real clinical use case within a broader physician-guided strategy.

Are RetzlerRx® supplements only for patients in Oregon?

No. While these supplements are used within physician-guided care programs in Portland and Lake Oswego, Oregon, they are also available to individuals across the United States seeking higher-quality nutritional support.

Do supplements replace medical care?

No. Supplements work best when integrated into a broader strategy that may include medical guidance, advanced diagnostics, body composition analysis, cardiovascular evaluation, metabolic testing, hormone assessment, and lifestyle interventions.

What makes RetzlerRx® different from generic supplement brands?

RetzlerRx® emphasizes practitioner-vetted formulas, clinically relevant ingredient forms, thoughtful dosing strategies, quality manufacturing, and integration with evidence-based preventive longevity medicine.

Does HormoneSynergy® only serve Portland and Lake Oswego?

HormoneSynergy® provides physician-guided longevity medicine services in Portland and Lake Oswego, Oregon, while also offering educational resources and supplement access for individuals across the United States.

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

HormoneSynergy® Longevity Medicine
Portland • Lake Oswego • Oregon
Evidence-Based Preventive Longevity Medicine