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This is because their blood doesnt carry as much oxygen
These may include: High Production Costs: Due to the intricacy of peptide synthesis and purification, the manufacture of copper peptide GHK-Cu is expensive
Lysyl oxidase, an enzyme that catalyzes the formation of covalent cross-links between collagen molecules, requires copper as a cofactor
[PMID: 9626749] PubMed record related to this compound for laboratory literature review
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