Understand the source comparison
Storage Stability Versus In-Vivo Clearance
Here's what most guides miss: the half-life of AHK-Cu in solution is an entirely separate variable from its plasma half-life. Lyophilised (freeze-dried) AHK-Cu stored at −20°C maintains >95% potency for 18–24 months. Once reconstituted with bacteriostatic wate
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- Here's what most guides miss: the half-life of AHK-Cu in solution is an entirely separate variable from its plasma half-life. Lyophilised (freeze-dried) AHK-Cu stored at −20°C maintains >95% potency for 18–24 months. Once reconstituted with bacteriostatic water, stability drops sharply. Expect 85–90% potency at 28 days when refrigerated at 2–8°C, with degradation accelerating if exposed to temperatures above 8°C. Copper peptides are particularly vulnerable to oxidative degradation in aqueous solution because the copper ion itself catalyses oxidation reactions. That's why every Real Peptides formulation includes stabilisers and specifies exact reconstitution volumes. Deviation from protocol accelerates peptide breakdown before it ever reaches the injection site.
- The practical implication: if you reconstitute a 5mg vial and use it over six weeks, the final doses contain significantly less active peptide than the first doses. Not because of in-vivo clearance but because of in-vitro degradation. We recommend calculating total study duration before reconstitution and preparing only what you'll use within the stability window.