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ghk cu and nad+ together GHK-CU NAD+ vs GHK-Cu: Choosing the
Description
Tap water or bottled drinking water contains minerals, chlorine, and potentially bacteria that can damage peptides and cause contamination
10.1007/s10787-017-0323-6 [DOI] [PubMed] [Google Scholar] Mermoud A., Baerveldt G., Minckler D

As with all research peptides, conservative storage and sterility practices are essential for maintaining compound integrity

Direct impact can denature peptide at the surface
