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

Ans : That's the natural assumption

Every batch of GHK-Cu undergoes rigorous HPLC-MS quality testing to verify purity, identity, and reproducibility giving researchers the confidence required for accurate and controlled laboratory experiments

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Its preservatives and sterile integrity decrease with time and this may affect safety

For a supplement to be effective, it needs to contain the reduced form