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Dr. Kathryn Retzler 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 RetzlerRx™ Private Label and Brand name supplements are used by Dr. Retzler in her private practice.

Our Manufacturers

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

To learn more about each company's quality control certifications please click any of the links below.

 

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
    "LongevityEssentials" pack at one of our manufacturing facilities.