Research Comparison
GHK-Cu vs KLOW Stack
A side-by-side research comparison of GHK-Cu and KLOW 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.
KLOW Stack
KLOW is a single preparation made of four separately studied peptides: the three in GLOW (GHK-Cu, TB-500 and BPC-157) with KPV added. KPV is the C-terminal tripeptide of alpha-melanocyte-stimulating hormone. The other three are, in turn, a copper-bound tripeptide first isolated from human plasma, the synthetic seven-residue thymosin beta-4 fragment Ac-LKKTETQ, and a 15-residue synthetic peptide derived from a sequence in a gastric juice protein. Cell culture and animal models make up nearly all of the work on each component. No published study has put the four together, and information about their chemical stability in a mixture is lacking, so the blend has no literature of its own.
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.