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RetzlerRx Probiotic Synergy DF350 high potency probiotic for gut health microbiome balance and immune support
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy
Probiotic Synergy DF350 – Ultra-High Potency, Multi-Strain Probiotic Probiotic Dr. Retzler’s Line of Premier Supplements HormoneSynergy

Probiotic Synergy DF350 | 350 Billion CFU High-Potency Probiotic

Regular price
$ 148.99
Sale price
$ 112.95
Quantity must be 1 or more

Probiotic Synergy DF350 | 350 Billion CFU High-Potency Probiotic

Support advanced gut health, immune resilience, and microbiome balance with RetzlerRx® Probiotic Synergy DF350, a physician-formulated probiotic designed for comprehensive digestive and microbial support.* Each serving delivers 350 billion CFU from 18 clinically studied probiotic strains, including HOWARU®, FloraFIT®, and Fonterra® HN019, for broad-spectrum microbiome support.*

Best for: Individuals seeking high-potency probiotic support for gut balance, digestive health, microbiome resilience, and immune function.

Unlike many standard probiotics, Probiotic Synergy DF350 uses acid-resistant DRCaps® technology to help protect delicate probiotic strains from stomach acid and deliver them more effectively to the intestines where they are intended to work.* This formula is especially well suited for individuals with more complex digestive needs, those recovering from antibiotic use, or those seeking practitioner-grade microbiome support.*

Key Benefits

  • 18-Strain Clinical Blend – Supports broad-spectrum microbiome balance and digestive wellness.*
  • Ultra-High Potency – Delivers 350 billion CFU per serving for advanced probiotic support.*
  • HOWARU® & FloraFIT® Strains – Support gut barrier health, digestion, and immune function.*
  • Fonterra® HN019 – Supports regularity, gut integrity, and microbiome resilience.*
  • Acid-Resistant DRCaps® – Helps protect probiotic strains from stomach acid for improved delivery.*
  • Gut Health Support – Promotes digestive balance, microbiome diversity, and nutrient absorption.*
  • Immune Support – Supports the gut-immune connection for whole-body wellness.*
  • Doctor Formulated – Designed using principles of functional and longevity medicine.
  • Clean Formula – Non-GMO, allergen-free, vegan-friendly, and free from artificial fillers.

Who May Benefit

  • Individuals seeking advanced probiotic support
  • People focused on gut and microbiome balance
  • Those recovering from antibiotic use
  • Individuals seeking digestive and immune support
  • People wanting a high-potency practitioner-grade probiotic

Why RetzlerRx®

RetzlerRx® supplements are developed using practitioner-grade standards and clinically relevant formulations. These products reflect the philosophy of HormoneSynergy® Longevity Medicine, where targeted nutrition, advanced diagnostics, and evidence-based preventive longevity medicine support long-term digestive, immune, and metabolic health.

  • Physician formulated
  • Practitioner-grade quality
  • Clinically selected strains and technologies
  • Non-GMO and allergen-free
  • No unnecessary fillers

Suggested Use

Take one capsule daily, or as directed by your healthcare provider. For best results, integrate consistently into your daily wellness routine.


Frequently Asked Questions

What does Probiotic Synergy DF350 support?

Probiotic Synergy DF350 is designed to support gut health, microbiome balance, digestive wellness, and immune resilience.*

What makes DF350 different from standard probiotics?

DF350 provides 350 billion CFU, 18 clinically studied strains, and acid-resistant DRCaps® technology for advanced probiotic delivery and support.*

What are HOWARU®, FloraFIT®, and Fonterra® HN019?

These are clinically studied probiotic strains and strain platforms selected to support gut balance, digestive function, regularity, and immune health.*

Why are DRCaps® important?

DRCaps® are designed to help protect probiotic strains from stomach acid so they can be delivered more effectively to the intestines.*


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

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