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GHK-Cu solution is blue — that is expected, right?

First time reconstituting GHK-Cu and the solution went distinctly blue. Mild panic, then I remembered the Cu stands for copper.

Can someone confirm the blue tint is just the copper complex and not a sign something went wrong? Want to log the observation correctly in my notebook rather than guess.

Blue is the copper complex doing exactly what copper complexes do. Welcome to the club — it's the prettiest thing in the rack. Log it as "blue tint consistent with Cu complex" and carry on.

Expected and well documented for copper peptides. If anything, a complete lack of any tint would be the more surprising observation to note.

Huge relief, thank you both. Notebook updated, panic cancelled. The Cu really should have been a hint.

Confirmed blue, confirmed copper, confirmed gorgeous. Nadia, welcome to the blue club. We convene every time someone reconstitutes GHK-Cu and audibly gasps.

The literature on the copper complex is genuinely fascinating once the panic subsides. Log "blue tint consistent with Cu complex" and then admire it like the rest of us happily do.

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