Is GHK-Cu supposed to be blue?

GHK-Cu solutions characteristically appear blue because copper ions bound to the peptide absorb light in a way that produces that color, which is a normal, expected property of the compound rather than a sign of contamination or degradation. A solution that is not blue at a concentration where blue is expected would be worth questioning, not the reverse.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of healing and recovery peptides. BPC-157, TB-500, GHK-Cu, and the tissue repair family, including what actually has human data.