How much GHK-Cu is in KLOW? Reading the blend label

KLOW's vial states one mass, 80 mg, and that figure is the combined peptide content of all four components rather than an amount of GHK-Cu. The GHK-Cu figure for a given vial is on its batch report, which lists the amount of each component separately.

KLOW is a four-peptide blend: BPC-157, TB-500, KPV and GHK-Cu lyophilized into a single vial. That is why its label numbers work differently from a single-peptide product, and why "how much GHK-Cu is in KLOW" is answered by a document rather than by the label. This guide covers what the 80 mg counts, where the per-component figure lives, why the reconstituted solution is blue, and how long the vial stays good.

What the 80 mg on a KLOW label counts

A blend label states the total peptide mass in the vial. For KLOW that is 80 mg shared across four molecules, so it is not 80 mg of GHK-Cu and not 80 mg of each peptide. Four components divide one number.

Because the vial holds four different molecules, KLOW has no molecular weight and no CAS number of its own. There is no single mass-spec line that covers the whole vial, which is why the reconstitution calculator reports mg/mL for a blend and leaves the molar column to the components. Peptide blends vs single vials covers what that means when you are choosing between one combined vial and four separate ones.

Where the GHK-Cu figure lives

Each component of a blend is tested on its own, so a KLOW batch report carries a line per peptide instead of one purity number for the vial. That report is where the GHK-Cu amount sits: it states the amount of each component for the batch your vial was filled from.

There is no fixed GHK-Cu figure that applies to KLOW as a product, because the ratio is set when the vial is filled and the report states it for that batch. If you want GHK-Cu as a share of the vial rather than a mass, divide the GHK-Cu line on the report by the 80 mg total.

Every KLOW vial carries a QR code that opens the report for its own batch, so the numbers belong to the vial in your hand rather than to a product page. How to read a peptide lab report walks through each line, and peptide blends explained covers how a combined vial is put together.

Why a reconstituted KLOW vial is blue

The colour comes from the GHK-Cu. Copper(II) complexes absorb red light, so the solution reads blue, while the copper-free form of the same tripeptide dissolves colourless. A KLOW vial that reconstitutes blue is behaving as it should, and a vial labelled GHK-Cu that goes into solution clear is worth comparing against its report first.

That colour is not a purity test and it does not replace the report. It is one identity check you can run at the bench without a lab, on the component that is hardest to confuse with the other three. The GHK-Cu handling guide goes through the check in full.

Mass share and molecule share also come apart here. At 403.91 g/mol, GHK-Cu is the second lightest of the four components after KPV, so a milligram of it is about three and a half times as many molecules as a milligram of BPC-157, and about twelve times as many as a milligram of TB-500. The heaviest component can hold the largest share of the label mass while contributing the fewest molecules.

How long a KLOW vial stays good

The dry vial is the stable form, which is why it ships at ambient temperature without a cold pack. Reconstitute it when you are ready to work rather than on arrival. Because a blend goes into solution as a unit, all four components start their clock at the same moment and you cannot hold one back while using another. Keep the mixed vial cold and out of light, since copper complexes are light-sensitive, and avoid repeated freeze-thaw cycles. How to store research peptides covers both states.

What KPV adds to the blend

KPV is the component that separates KLOW from GLOW. GLOW is the three-peptide version, BPC-157, TB-500 and GHK-Cu, and KLOW adds KPV as a fourth. KPV is Lys-Pro-Val, the C-terminal tripeptide of alpha-MSH, at 353.42 g/mol. It is the lightest molecule in the vial and the smallest peptide in the catalog, which gives it the highest molecule count per milligram of the four.

Like the other three components, KPV gets its own line on the batch report. The KPV handling guide has its identity sheet and concentration table. If you want a copper peptide on its own instead of inside a blend, GHK-Cu is sold separately in 50 mg and 100 mg vials, and GHK-Cu in Canada covers what it costs and where it comes from. The related copper tripeptide is set out in GHK-Cu vs AHK-Cu.

Every KLOW vial from pepuro ships free, from our Calgary, Toronto and Vancouver distribution centers, the same business day your e-Transfer clears, with a QR code on the vial that opens its independent, third-party lab report.

For research use only. Not for human or animal consumption.