Dr. Kathryn Retzler and HormoneSynergy® teamed up with what we believe to be the highest quality supplement manufacturers in the United States to make sure you receive unsurpassed, quality formulas that are safe, affordable and effective.

All HormoneSynergy®  Private Label and Brand name supplements are used by Dr. Retzler in her private practice.

Our Manufacturers

All private label supplements distributed to patients or customers by HormoneSynergy®  are manufactured by companies that only sell to licensed healthcare providers and follow strict quality control guidelines.


Dr. Retzler and Daniel Soule (HormoneSynergy's Owner) have personally toured all facilities that currently manufacture HormoneSynergy products.
Dr. Retzler and Daniel Soule (HormoneSynergy's® Owner) have personally toured many of the facilities that currently manufacture HormoneSynergy® products.
    Dr. Retzler celebrates as she personally witnesses the first run of her custom
    "Longevity Essentials" pack at one of our manufacturing facilities.

    Customer Reviews

    "An excellent seller, immediate service, great product at a great price!"

    By frogy on September 8, 2017

    "Arrived very promptly and received two emails with helpful information."

    By Jill on August 26, 2017

    "Outstanding service! Package came early and just what I ordered. Excellent quality product and I'm already sleeping better!!!!!"

    By Amazon Customer on December 21, 2017

    "Thank for the prompt delivery! At first I was using the CBD Softgels and loved them - I now use CBD With Curcumin and am experiencing even better results. Thank you!"

    By Jason on February 24, 2018

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    *These statements have not been evaluated by the United States Food and Drug Administration. HormoneSynergy supplements are not meant to be taken as an alternative to prescription medications recommended by your physician. If you are seeking to replace any pharmaceutical medication with any of our products we recommend that you do so only after consulting your healthcare provider. *You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you. 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.