Research Comparison
GHK-Cu vs GLOW Stack
A side-by-side research comparison of GHK-Cu and GLOW Stack drawn from DRPSHP' peptide database records.
GHK-Cu
GHK-Cu is glycyl-histidyl-lysine bound to copper(II), a combination originally purified from human blood plasma. The peptide alone grips copper tightly, and in cosmetic ingredient lists the complex goes by copper tripeptide-1. The evidence divides into three tiers: experiments on cultured fibroblasts and skin cells, wound and tissue studies in animals, and a handful of topical-product studies in volunteers. Those human studies are small and cosmetic in origin, not rigorous clinical trials. Statements that it changes the activity of huge numbers of genes derive mainly from re-analysing existing expression datasets from cell lines, which shows correlation instead of a proven tissue effect.
GLOW Stack
GLOW is a single preparation containing three separately studied peptides: GHK-Cu, TB-500 and BPC-157. GHK-Cu is the copper(II) complex of glycyl-histidyl-lysine, a tripeptide originally isolated from human plasma. TB-500 is the seven-residue synthetic fragment Ac-LKKTETQ, copied from the actin-binding region of thymosin beta-4. BPC-157 is a 15-residue synthetic peptide derived from a protein described in gastric juice. Each has its own literature, largely in cell culture and animals. No published study has tested the three together, and there is nothing on how stable they are, or how they behave, when mixed.
Reading a comparison
A comparison places two records side by side; it does not merge them. Each description above is drawn from that compound's own record, and the two were not necessarily characterised by the same methods, at the same time, or to the same level of detail. Before comparing any attribute, it is worth establishing that both records describe the substance you think they describe — names are not identifiers, and two entries sharing a name can differ in salt form, stereochemistry or the convention used to state a mass. Where a figure carries no method beside it, the comparison is between two reported numbers rather than between two measurements.