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Dose-response and time-course designs are common in this compound class to characterize concentration-dependent effects, and researchers often pair AHK-Cu with structurally related copper peptides as comparative controls within the same experimental design, including common comparative peptides like TB-500 and BPC-157

Another safety trial registered in 2015 but cancelled the next year, again with nothing published.

[7] Targeting Angiogenesis and Nitric Oxides Actions: Comment on BPC 157 Review MDPI

Because unopened vials are good until their printed expiry (typically a couple of years), a modest reserve is low-risk