It functions as a cofactor for lysyl oxidase (the enzyme responsible for collagen cross-linking and stabilization), ceruloplasmin (a copper transport protein with antioxidant activity), and superoxide dismutase (SOD, a primary antioxidant defense enzyme)
(9) Fangru Jiang, Yanan Wu, Zhe Liu, Minhua Hong, and Yi Huang (2023) Synergy of GHK-Cu and hyaluronic acid on collagen IV upregulation via fibroblast and ex-vivo skin tests Journal of Cosmetic Dermatology, 2023 Sep, Volume 22 (Issue 9), Pages 2598-2604
The effects of human GH and its lipolytic fragment (AOD 9604) on lipid metabolism following chronic treatment in obese mice and beta(3)-AR knock-out mice
Once you pierce the vial, there is nothing preventing bacterial colonization
Compounding and Regulatory Oversight Peptide compounding rules change all the time and depend on the state