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.*



NeuroMag | Magnesium L-threonate plus Magtein | Optimized for Brain Health* | 60  Servings
Save 15%
Umbrellux® DAO is a patente...
S-Acetyl Glutathione | 120 Acid-Resistant Veg. Capsules | Acetylated Form of Glutathione
Save 36%
S-Acetyl Glutathione is an ...
$88.31 $56.95
Glutamine Synergy | Powerful Gastrointestinal Lining Support* | 9.27 oz. (259.8 g) Powder
Save 26%
Metabolic Recovery  Formula "FREE" | Sugar and Stevia Free " GHI " Support
Save 12%
Metabolic Recovery FREE GHI...
$70.42 $61.95
Metabolic Recovery  Formula Vanilla | Gastrointestinal, Hepatic and Intestinal " GHI " Support
Save 12%
HormoneSynergy UbiQuiMax Co...
Metabolic Recovery  Formula Chocolate | Gastrointestinal, Hepatic and Intestinal " GHI " Support
Save 12%
Leaky Gut Support
Save 11%
Leaky Gut Support features ...
$43.99 $38.95
Breast Protect | Comprehensive Support for Detoxification*
Save 13%
HormoneSynergy Breast Prot...
$63.10 $54.95
OsteoStrength MK-7™ 60 pkt | Supports Bone Health & Strength*
Save 11%
OsteoStrength MK7 is a comp...
$86.69 $76.95
Liposomal Glutathione PLUS Riboflavin and B6
Save 14%
Liposomal Glutathione Syner...
$69.95 $59.95
Methyl B Synergy - Methylation Support* | 120 V-Caps
Save 9%
Methyl B Synergy a comprehe...
$48.55 $43.95
Liposomal Glutathione Syner...
Mitochondrial Synergy
Save 14%
Mitochondrial biogenesis is...
$158.80 $136.95
Testosterone - Protect | Natural Estrogen Blocker and Liver Support Formula*
Save 13%
Test - Protect is a compreh...
$63.10 $54.95

*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.