

RetzlerRx® Probiotic Synergy DF350 is a premium, ultra-high potency probiotic designed for comprehensive gut, immune, and microbiome support. Each serving delivers 350 billion CFU from an advanced blend of 18 clinically studied strains, including HOWARU®, FloraFIT®, and Fonterra® HN019 — some of the most researched probiotics in the world.
Unlike standard probiotics, Probiotic Synergy DF350 uses acid-resistant DRCaps® to protect delicate strains from stomach acid, ensuring they survive and thrive in the intestines where they are most effective.
Crafted by Dr. RetzlerRx™ for advanced microbiome rebalancing, DF350 is ideal for those with complex digestive needs, recovering from antibiotic use, or seeking the best high-strength probiotic for long-term gut and immune resilience.
✔ 18-Strain Clinical Blend – Provides broad-spectrum support for gut balance and immune defense.
✔ Ultra-High Potency – 350 billion CFU per serving for maximum effectiveness.
✔ HOWARU® & FloraFIT® Strains – Validated in clinical studies for gut barrier, digestion, and immune function.
✔ Fonterra® HN019 Bifidobacterium lactis – Researched for regularity, gut integrity, and resilience.
✔ Acid-Resistant DRCaps® – Protect probiotics from stomach acid for superior survival and delivery.
✔ Gut Health Support – Promotes digestion, reduces bloating, and enhances nutrient absorption.
✔ Immune Strength – Supports the gut-immune connection for whole-body wellness.
✔ Doctor Formulated – Precision-designed for advanced gut and microbiome support.
✔ Clean & Pure – Non-GMO, allergen-free, vegan-friendly, with no artificial fillers.
Take one capsule daily, or as directed by your healthcare provider. For best results, integrate consistently into your daily wellness routine.
RetzlerRx® Probiotic Synergy DF350, with HOWARU®, FloraFIT®, Fonterra® HN019, and acid-resistant DRCaps®, is the ultimate science-backed probiotic for gut, immune, and microbiome health.
Note: These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
*Dr. Retzler specializes in Age Management / Longevity Medicine. Dr. Retzler will NOT assume the role of your primary care physician and will refer to other specialists (gynecologist, cardiologist, urologist, endocrinologist, etc.) for specialized care when necessary. Dr. Retzler's services are not a substitute for your existing relationships with your Primary Care Doctor or other Health Care Specialists. You can refer back to them at any time.
*HormoneSynergy® LLC only prescribe hormones within the context of a comprehensive treatment plan. No hormones are prescribed to anyone with a history of illegal steroid use, looking for isolated improvements in sports performance, or bodybuilders. No medications or hormones will ever be dispensed without an in-office consultation, comprehensive medical evaluation, laboratory testing, a prescription, and proper follow up protocols. HormoneSynergy® Clinic, LLC does NOT accept Medicare, Medicaid or TriCare and does not participate with any insurance providers, accept any insurance reimbursement, or make any profit from lab testing. Our clinic does not prescribe growth hormone for anti-aging purposes.
*The information provided on this website is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her physician. For medical diagnosis, seek advice from a medical professional to help evaluate your symptoms and condition.
*Statements on this website have not been evaluated by the United States Food and Drug Administration. The information provided about our protocols or any HormoneSynergy® nutritional supplement or any information contained on or in any product label or packaging is for educational purposes only and is not intended as a substitute for advice from your own physician or health care professional. You should always consult with a licensed healthcare professional before starting any diet, exercise or supplementation program, before taking any medication, or if you have or suspect you might have a health problem.