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Description
In contrast, systemic bioavailability following subcutaneous or intramuscular administration can vary widely, typically ranging from 20% to 100%, depending on factors such as enzymatic degradation at the injection site, absorption kinetics, and lymphatic uptake [9]

When applied to your skin, GHK-Cu signals skin cells to ramp up collagen synthesis

[DOI] [PMC free article] [PubMed] [Google Scholar] 106.Crane F.L
10.1016/j.molmet.2020.100978 Mol
