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Common side effects include nausea, diarrhea, constipation, decreased appetite, and vomiting

Your natural GHK-Cu levels decline significantly with age

[5] Topical GHK-Cu is generally considered well tolerated, yet therapy should be avoided in individuals with a known hypersensitivity to copper peptides or any vehicle component

Once reconstituted with bacteriostatic water , the solution remains viable 28-30 days refrigerated maximum, with sterile water reducing this to merely 5-7 days due to rapid bacterial growth without preservatives

Mice were divided into GHK-Cutreated and saline-treated groups, along with wild-type controls