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Contraindications and Precautions While GHK-Cu is generally well-tolerated, certain conditions warrant caution or avoidance

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Compounded Injectable GHK-Cu Requires a prescription and a compounding pharmacy

Storage duration critically impacts effectiveness - reconstituted GHK-Cu lasts only 21-28 days refrigerated due to copper oxidation concerns (shorter than most peptides), requiring strategic reconstitution of amounts usable within this window rather than preparing entire vials at once

The molecular weight of DSIP sits at approximately 849 Daltons, making it a relatively small peptide that can potentially cross the blood-brain barrier