Longevity Medicine


Discover RetzlerRx® longevity medicine supplements, a collection of functional medicine, physician-formulated formulas designed to support optimal health, vitality, and healthy aging. Each product features clinical-grade nutrients developed by Dr. Kathryn Retzler and the HormoneSynergy® team, with secure USA shipping available nationwide.

Featured formula: RetzlerRx® Intest-Immune DF Plus · See all RetzlerRx® products: Shop the full physician-formulated line

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36 products
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