Dr. Kathryn Retzler has developed a line of private-labeled nutritional supplements to make sure you receive unsurpassed, quality formulas that are affordable and effective. All supplements that bear a HormoneSynergy® label are manufactured in facilities that have pharmaceutical or NSF certification and are certified for good manufacturing practices (CGMP).

It's important to keep in mind that not all supplement brands are alike, no matter what the label or packaging may claim.  All HormoneSynergy® formulas are manufactured by companies that perform product analysis to verify safety, potency, and bioavailability. Several HormoneSynergy® supplements have undergone clinical trials to ensure efficacy, and all HormoneSynergy® supplements are used by Dr. Retzler in her private practice.*



Diamine Oxidase DAO - Free Shipping!
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Umbrellux™ is the original ...
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NeuroMag | MIXED BERRY FLAVOR | Magnesium L-Threonate for Brain, Stress, Anxiety | Free Shipping
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S-Acetyl Glutathione (Emothion®) | Acetylated Glutathione | Free Shipping!
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S-Acetyl Glutathione is an ...
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Glutamine Synergy | Gastrointestinal Lining Support* | Free Shipping!
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OsteoStrength MK-7™ 60 pkt | Supports Bone Health & Strength* | Free Shipping!
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OsteoStrength MK7 is a comp...
$86.69 $81.95
Metabolic Recovery  Formula Vanilla | Free Shipping!
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Gastrointestinal, Hepatic a...
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Methyl B Synergy - Methylation Support* | 120 V-Caps | Free Shipping!
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Methyl B Synergy a comprehe...
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Breast Protect | Comprehensive Support for Detoxification* | Free Shipping!
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HormoneSynergy Breast Prot...
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Synergy KETO BHB | Exogenous Ketone Supplement | Orange Mango | Free Shipping!
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Synergy KETO BHB Exogenous ...
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Full Spectrum Hemp Oil Lavender / Eucalypus Balm - 500 mg - FREE SHIPPING
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This Full Spectrum Lavender...
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*These statements have not been evaluated by the United States Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent disease. The information provided about this or any HormoneSynergy® nutritional supplement or any information contained on or in any product label or packaging is for informational 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. As with any nutritional supplement do not take if you are pregnant or nursing or while taking medications without consulting your healthcare practitioner.