GLOW MIX blend (GHK-Cu, BPC-157, TB-500): constituents, identity and published literature

What GLOW MIX is

GLOW MIX is not a single molecule. It is a three-component peptide blend supplied in one vial, and GLOW is a nonstandard commercial blend name used for the combination of GHK-Cu, BPC-157 and TB-500. The name carries no chemical meaning: it identifies a packaging format, not a compound, and no registry or nomenclature body recognises it. The material is intended only for controlled laboratory research involving multiple peptide analytes, and it is listed in the dermatology-research section of the catalogue.

Because a blend has no structure of its own, its identity is the identity of its three constituents. GHK-Cu is a copper-complexed tripeptide, BPC-157 is a synthetic 15-residue peptide, and TB-500 is a synthetic acetylated 7-residue peptide. Each is described separately below and each has its own reference guide. A blended vial also means the three peptides share one lyophilisate, one reconstitution and one set of handling conditions, which is the practical difference between buying a blend and buying three vials.

The catalogue records no synonyms for the blend beyond the GLOW name itself. GLOW MIX is supplied strictly as a laboratory research material and is not for human or veterinary use, nor for consumption, administration, diagnostic use or therapeutic use.

Structure and identifiers

The catalogue entry records no CAS registry number, no molecular formula and no molecular weight for the blend, and none is stated here. That absence is expected rather than an omission: a mixture of three peptides has no single formula and no single mass, so the identifiers that matter belong to the constituents individually and are listed on their own pages. The blend is offered in one 70 mg vial format, which is the total peptide mass across the three components.

GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, sequence Gly-His-Lys. The copper ion is coordinated by the peptide rather than bonded covalently to it, which makes the material a metal complex and gives it its characteristic blue colouration in solution. Its constituent guide is at GHK-Cu.

BPC-157 is a synthetic 15-residue peptide, sequence GEPPPGKPADDAGLV, corresponding to a partial sequence of a protein found in human gastric juice, from which the name body protection compound is taken. The chain is proline-rich in its central region and carries no metal and no recorded terminal modification. Its constituent guide is at BPC-157.

TB-500 is a synthetic 7-residue peptide, sequence Ac-LKKTETQ, an N-terminally acetylated fragment corresponding to the actin-binding region of the protein thymosin beta-4. It is a fragment rather than the full 43-residue protein, and the two are distinct materials. Its constituent guide is at TB-500.

What the published literature has examined

Published work has examined the constituents of this blend in in-vitro fibroblast and keratinocyte culture, gene-expression datasets and topical formulation systems within dermatology, tissue-remodeling and oxidative-stress research. The papers listed on this page are bibliographic references only; they are not evidence of safety or efficacy and describe laboratory findings, not any use in people or animals. There is no literature on GLOW MIX as a combination: the blend is a commercial format, and every reference below concerns a single constituent studied on its own.

The reference set attached to this entry is drawn entirely from the GHK and GHK-Cu literature and spans 2008 to 2025. Its centre of gravity is the tripeptide's role in skin and connective-tissue research. One strand is gene-expression analysis, in which the peptide is examined against transcriptome and public gene-data resources rather than in a wet assay, an approach that produces expression-pattern descriptions instead of phenotype measurements. A second strand is tissue-remodeling research on the human tripeptide, published in a biomaterials journal, where the context is scaffold and matrix chemistry as much as cell biology. A third is oxidative-stress and aging biology, framed in that literature around degenerative processes at the cellular level. A fourth is formulation science: a recent review examines the peptide as a topical agent and addresses delivery through the skin barrier, stability in cosmetic vehicles and the analytical problems that arise when a copper complex is incorporated into a formulation.

Model systems that recur across this work include cultured dermal fibroblasts and keratinocytes, three-dimensional skin-equivalent constructs, cell-free matrix and collagen assays, and ex-vivo skin sections used for permeation testing. Analytical methods include microarray and RNA-sequencing readouts with pathway annotation, reverse-phase HPLC, mass spectrometry, spectroscopic methods suited to copper coordination such as ultraviolet-visible and electron paramagnetic resonance spectroscopy, and Franz-cell diffusion apparatus in the formulation work.

BPC-157 and TB-500 carry their own reference sets, which are listed on their constituent pages rather than duplicated here. This section describes fields, models and methods only. No result or endpoint from any cited study is stated on this page, and none of them establishes safety or efficacy for any use.

Storage and handling as a laboratory reagent

No compound-specific storage rows are recorded in the catalogue entry, so the general handling profile for lyophilized research peptides applies, with one blend-specific point. In lyophilized form the vial is held at -20 C, protected from light, and kept sealed until it is opened. Protection from light matters more than usual here because one constituent is a copper complex, and metal-peptide complexes are the most light-sensitive and oxidation-sensitive materials in this catalogue. Allowing a cold vial to reach room temperature before opening keeps condensation from forming on the dry solid.

Once reconstituted, the solution is a short-lived laboratory reagent rather than a stock. Reconstituted solutions are held refrigerated at 2 to 8 C for short-term laboratory use, kept out of direct light, and protected from repeated freeze-thaw cycling. Freeze-thaw damage is compounded in a blend, since three peptides with different aggregation behaviour are cycled together and the composition of the solution can drift away from the nominal ratio without any visible change.

Concentrations are worked out before diluent goes into the vial, and for a blend the vial mass is the combined mass rather than the mass of any one component. The reconstitution calculator converts a vial mass and a target concentration into a diluent volume, and bacteriostatic water is the diluent most commonly catalogued for laboratory vials that will be entered more than once.

Analytical verification

Identity and purity for a blend are established per constituent. Purity is assessed by third-party reverse-phase HPLC, where the chromatogram resolves the three peptides from one another and from synthesis-related species such as deletion sequences and oxidation products, so that each component is integrated as its own peak rather than counted into a single total. Identity is assessed by mass spectrometry against the expected molecular weight of each constituent, which is the only way to confirm that all three named peptides are present in the vial rather than two of the three. A certificate of analysis is issued for each lot, and the certificates are held in the certificate library.

Two related articles cover how those documents are read. HPLC peptide purity explains how a chromatogram becomes a purity percentage and why a multi-component trace has to be interpreted peak by peak. How to verify a peptide certificate of analysis sets out which fields on a certificate carry weight, including lot identity, test dates and the identity of the testing laboratory. Purity and identity information on this page is limited to exactly that: third-party HPLC and mass spectrometry, with one certificate per lot. No purity figure, component ratio, lot number or testing-laboratory name is stated here, because those values belong to individual lots and are reported on the certificate for the lot supplied.