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Unlike many other peptide therapies, GHK-Cu typically isnt administered as an injectable

It penetrates mitochondria to protect mitochondrial DNA from oxidation, chelates free iron and copper to prevent the highly destructive Fenton reaction, absorbs UVA rays to protect skin cells from photoageing, and unlike vitamin C or iron never becomes pro-oxidant, even at high doses

Many clinics recommend pairing glutathione whitening injections with Vitamin C either via oral supplements or injectable forms for superior outcomes

Does injectable GHK-Cu have human clinical trials backing it

doi: 10.1016/0022-510X(90)90004-7 92 EskelinenE.-L

Antioxidant Protection: Shields skin from free radical damage