Dr. Retzler's Longevity Blog
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Is there lead in protein powders and shakes? Are Protein Powders Contaminated?
Is there lead in protein powders and shakes?
Recent reports show lead in retail protein powders. Discover why RetzlerRx®, Designs for Health, Xymogen and Metagenics® proteins stand apart—tested for heavy metals and physician-approved.
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Not All Collagen Supplements Are the Same: Why RetzlerRx® Collagen Peptides Stand Out
Not all collagen is created equal. Discover why RetzlerRx® Collagen Peptides, available at HormoneSynergy® in Portland and Lake Oswego, provide clinically proven support for bones, joints, skin, and whole-body longevity.