GLOW vs KLOW: what is in each blend

The short answer

The KLOW column shows how the blend is commonly listed, not a fixed standard. Amounts, container types and container counts vary between listings, so read every label rather than relying on the name. The GLOW column is Vivora's own listing.

The practical difference is one extra component. Everything else in the comparison follows from that: the combined totals differ, a per-mg price across the whole blend is not like-for-like, and the two products need separate entries in any record.

What is in GLOW

• Name: GLOW GHK-Cu, catalogue code VV-GL.
• Components: BPC-157 10mg, TB-500 10mg and GHK-Cu 50mg.
• Label strength: 70mg, the sum of the three stated amounts.
• Pens per box: two pre-filled research pens.
• Packaging: one sealed, batch-coded window box holding both pens.
• Price: £100 per box, with the UK delivery charge shown before payment.

The listing does not state how the amounts are divided between the two pens. Record the three component amounts and the pen count exactly as listed, and leave any per-pen field blank unless Vivora confirms a split.

The catalogue name, GLOW GHK-Cu, names one component because GHK-Cu is the largest by mass: 50mg of the 70mg label strength. It is still a three-component blend, not a standalone GHK-Cu product, and Vivora does not currently sell GHK-Cu on its own. Current price and stock are on the GLOW 70mg pen product page.

What KLOW adds: KPV

KPV is written in one-letter amino-acid code: K for lysine, P for proline and V for valine. PubChem records Lys-Pro-Val as a tripeptide (CID 125672), with the molecular formula C₁₆H₃₀N₄O₄, a molar mass of 342.43 g/mol and CAS number 67727-97-3. The same record indexes it as alpha-MSH (11-13): the three residues at positions 11 to 13 of alpha-melanocyte-stimulating hormone.

A practical warning for record-keeping: searching PubChem for the three letters "KPV" on their own returns an unrelated small molecule, not the tripeptide. Search by the sequence name, Lys-Pro-Val, or by the CAS number instead, and write the full name in your records next to the abbreviation.

Vivora does not sell KPV, either on its own or in a blend, and does not sell a KLOW product. This guide describes KLOW so that the two names, which differ by a single letter, are not confused in orders or records.

The three shared components

GHK-Cu is the copper complex of GHK, the tripeptide glycyl-L-histidyl-L-lysine. PubChem's GHK-Cu record (CID 165429100) gives the formula C₁₄H₂₂CuN₆O₄ and a molar mass of 401.91 g/mol; Vivora's product page lists CAS number 89030-95-5, the same formula and a molar mass of 401.9 g/mol. A name search for GHK-Cu also returns other records, including one with two GHK groups for each copper atom and the formula C₂₈H₄₈CuN₁₂O₈, so record the CAS number and formula, not just the name.

BPC-157 is a fifteen-amino-acid peptide: PubChem's record (CID 9941957) lists CAS number 137525-51-0, the formula C₆₂H₉₈N₁₆O₂₂ and a molar mass of 1419.5 g/mol. TB-500 is recorded in PubChem as the acetylated seven-residue peptide Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln-OH (CID 62707662), with a molar mass of 889.0 g/mol; Vivora's product page describes it as a synthetic thymosin beta-4 fragment.

Reference data describes the compounds named on a label. It does not show what a particular pen or vial contains.

Reading GLOW and KLOW labels side by side

Compare the two blends component by component. For each one, write down every compound, its stated amount and the number of containers. The three shared components can then be compared line by line, and KPV appears as an extra line that GLOW does not have.

Do not compare the combined totals. A 70mg GLOW figure and an 80mg KLOW figure are sums of different component lists, so the difference between them is not a difference in any single compound. The same applies to price: Vivora's GLOW is £100 for 70mg of combined stated content, about £1.43 per mg, but that figure is only meaningful against another blend with the same three components in the same amounts.

Check the format as well as the contents. GLOW is supplied as two pre-filled pens. A KLOW listing may be a pen, a vial or several containers, and pens usually cost more per mg than vials because the price covers the device and the filling step. The research pens and vials guide covers format comparisons in detail.

Recording GLOW in an inventory

A clear inventory entry lists GLOW once, with its catalogue code, VV-GL, and the batch code printed on the box. List each component underneath on its own line: BPC-157 10mg, TB-500 10mg and GHK-Cu 50mg. Add the pen count, two, as a separate field, and leave any per-pen field blank until a split is confirmed.

If your laboratory also holds a KLOW product from another supplier, give it a separate entry with all four components listed, even though three of them overlap with GLOW. Overlapping components do not make two products interchangeable, and a document for one never covers the other. Write the KPV line in full, as Lys-Pro-Val, so that a later search finds it.

Record fill volume and concentration only if the listing or the seller states them. Do not estimate either from the label strength.

How GLOW relates to the BPC/TB blend

Vivora's BPC-157 & TB-500 pen contains two of GLOW's components at the same stated amounts, 10mg each, in a single pen. GLOW adds GHK-Cu 50mg and a second pen. They are separate products with separate catalogue codes and batch codes, so a document for one does not cover the other.

If your laboratory holds both, keep them under separate entries even though two components overlap. The BPC-157 and TB-500 blend guide covers that product in detail.

Questions to ask about any blend

• Does the label list every component with its own stated amount, or only a total?
• How many pens or vials are in the box, and does the listing state how the amounts are divided between them?
• Which batch code is printed on the box?
• If the seller publishes a test report, does it give a result for each component, with units, and does it verify on the testing laboratory's own website?
• Which storage conditions does the label or batch record state?

Write down the answers and the date with your purchasing records. If anything about Vivora's GLOW listing is unclear, contact Vivora before ordering.

Research use only

GLOW is a product name. It does not describe an effect, and Vivora makes no claims about effects of any kind. The blend is supplied for laboratory research only: it is not a medicine or a cosmetic, it is not for human or animal use, and it comes without preparation, dosing or administration guidance.

Buyers must be 18 or over and must confirm research use before an order is accepted. Orders that indicate human or animal use are cancelled and refunded. Read the research-use policy, then compare the current range.

Common questions

What is the difference between GLOW and KLOW?

GLOW contains BPC-157, TB-500 and GHK-Cu. KLOW is commonly listed as the same three compounds plus KPV.

Does Vivora sell KLOW?

No. Vivora sells GLOW only, as two pre-filled research pens per box.

What does the 70mg on GLOW mean?

It is the combined label strength: BPC-157 10mg, TB-500 10mg and GHK-Cu 50mg. It is not 70mg of any single compound.

What is KPV?

The tripeptide Lys-Pro-Val. PubChem records it under CID 125672 and also indexes it as alpha-MSH (11-13).