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Cytotoxicity assay Upon necrotic cell damage cells lose membrane integrity and cytoplasmic contents can leak out
At optimal concentrations, GHK-Cu increases mRNA production for collagen types I and III, elastin, proteoglycans, and glycosaminoglycans, while laboratory studies show that topical application for 12 weeks improves collagen production in 70% of subjects compared to 50% with vitamin C and 40% with retinoic acid
Larger injection volumes can be uncomfortable and impractical, especially if multiple injections are needed to get the full dose
Discontinue use if irritation or redness occurs
This window allows the peptide to reach peak plasma concentration and begin binding NNMT enzymes before dietary nicotinamide from food enters the system
