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The quality and purity of peptide preparations can vary significantly between sources, raising concerns about consistency and safety

GHK-Cu is supplied lyophilised (freeze-dried) in a sealed vial

If endogenous peptides are like OEM parts in the machinery of your body, then we can liken synthetic peptides to 3D prints: in terms of structure and function, theyre similar if not identical

Berlin R, Berlin H, Brante G, Pilbrant (1978) Vitamin B12 body stores during oral and parenteral treatment of pernicious anaemia

In response to questions from Guardian Australia, a Phyx spokesperson said its setup was not a shopping process for prescription medicines and did not constitute advertising to the public