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GHK-Cu (glycyl-L-histidyl-L-lysine copper peptide) is a naturally occurring tripeptide found in human plasma, saliva, and urine

B12 shots or injections can support this process by aiding enzymes that facilitate amino acid metabolism, contributing to energy production and overall cellular health

But the response has not been better skepticism

The phenolic hydroxyl group derived from the tyrosine fragment may be sensitive to oxidative conditions

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