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While animal studies suggest safety, long-term human studies are lacking

The test reveals genetic predispositions in collagen synthesis and peptide pathways, which can help inform whether GHK-Cu may align with your biology

Copper Toxicity Concerns Because GHK-Cu contains copper, some individuals have questions about copper metabolism and the risk of toxicity

Avoid use at the same time with vitamin C serums or lotions , as experts believe the low pH of the vitamin C may destroy the GHK-Cu compound (it is okay to separate by a few hours)

Formulation factors beyond concentration significantly impact efficacy

Some brands use trace amounts of GHK-Cu and still call it a copper peptide serum