GLOW peptide blend: the three components, the COA, the 70 mg vial

GLOW is a trade name for a fixed mixture of three synthetic peptides, weighed separately and freeze-dried together in one vial. The name says nothing about the contents; the label and the certificate do. The three components are:

Total: 70 mg in one sealed 3 mL glass vial.

Each of the three is a peptide the catalog also sells on its own, with the same sequence, the same acetate salt form and the same laboratory testing. Research use only. Not for human or veterinary use.

Search engines return the name next to cosmetic brands, marketplace listings and forum threads. None of that describes the object a laboratory receives. What follows does.

Seventy milligrams of freeze-dried peptide is a substantial cake, seven times the fill of a standard 10 mg vial. In the vial it forms a visible blue-violet layer, and the color is the first check.

Why blue-violet. Fifty of the seventy milligrams are GHK‑Cu, the copper(II) complex of the tripeptide glycyl-histidyl-lysine.

Copper(II) in that coordination is blue-violet; the two other peptides are white. The cake therefore shows the GHK‑Cu tint, slightly diluted. A white "GLOW" cake did not receive its copper tripeptide.

Why 50 / 10 / 10. The three masses are the same quantities the components are sold at on their own, or a multiple of them: 10 mg is the base vial of BPC‑157 and of TB‑500, and 50 mg is half the base 100 mg vial of GHK‑Cu.

The proportions were set by what each single vial holds, which keeps the blend comparable with three separate purchases.

What "BPC‑157" and "TB‑500" mean here. BPC‑157 is a defined 15-residue sequence (Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val) and there is no ambiguity about it.

"TB‑500" is a trade name that covers more than one object on the market: the catalog's TB‑500 is the acetylated heptapeptide Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln (residues 17 to 23 of thymosin β4, 889.0 g/mol), while some vendors sell full-length thymosin β4 (43 residues, about 4,963 Da) under the same name.

The mass on the certificate tells you which one went into the vial. The full data sheet is in TB‑500 peptide: sequence, mass, CAS.

A single-peptide COA has one main peak and one expected mass. A GLOW certificate has three of each, and the reading takes a minute longer.

Three peaks on the chromatogram

On a reverse-phase HPLC run, BPC‑157, GHK‑Cu and TB‑500 elute at three different retention times, so the trace shows three main peaks.

The laboratory assigns each peak by running the reference standard of each peptide under the same gradient, then computes a purity figure for each component from the area of its own peak.

Look for three purity figures, one per component. A single averaged percentage for the whole vial is a shortcut that can hide a weak component behind two strong ones.

Three expected masses on the spectrum

Mass spectrometry of the dissolved sample must show ions at about 1,419.5 (BPC‑157), 340.4 (GHK, the copper dissociating under ionization) and 889.0 (TB‑500).

Three masses present, three components present. A fourth mass, 342.4, would mean KPV, which belongs to KLOW, not GLOW.

The fields that never change

• A named independent laboratory and a verifiable test number (Janoshik Analytical is the reference in this market; its reports can be looked up on the lab's site).
• The lot number, printed on the vial you receive.
• The test date and a photograph of the tested vial wearing the supplier's own label.

OXpeptides publishes the certificate of each lot in the COA library and on the GLOW product page as soon as it comes back from the laboratory.

How each field is read, and what an edited certificate looks like, is in how to read a peptide COA.

Two questions come up on every GLOW listing: how it differs from KLOW, and whether the blend is the same thing as buying the three peptides separately.

GLOW vs KLOW. KLOW is GLOW plus 10 mg of the tripeptide KPV (Lys-Pro-Val), 80 mg in total. The two cakes look identical; only the label, the fourth peak and the fourth mass tell them apart.

The four-component blend has its own guide, KLOW peptide blend, and its own product page. The catalog ships GLOW to the United States only; KLOW also ships to Canada, the UK, Australia and Europe.

GLOW vs separate vials. The peptides are the same.

What differs is the lot discipline: one vial means one lot, one certificate and one storage line, against three lots and three certificates.

A laboratory that wants to hold each compound on its own keeps the three separate; one that wants a fixed, pre-weighed mixture takes the blend.

The catalog also lists a two-peptide vial, BPC‑157 + TB‑500, for the pair without the copper tripeptide; the two are compared in BPC‑157 and TB‑500.

GLOW comes in one size, 70 mg, because the blend is defined by its three fixed masses. The catalog card at the top of this page reads the live price.

Compared with the smallest single vials of the three components (10 mg BPC‑157, 100 mg GHK‑Cu, 10 mg TB‑500), the blend costs less than the sum, since one fill, one label and one laboratory test replace three of each; it also holds half the GHK‑Cu of that sum.

What the price includes at OXpeptides: a sealed, labeled vial from a tested lot, its batch COA, and a replacement if the parcel arrives lost or damaged.

Ships from France (EU) and California (US) · tracked, tracked: $19, free from $150.

See GLOW in the catalog →

The blend is stored to the standard of its most demanding component, the copper complex, which also asks to be kept from oxygen:

• Temperature: −20 °C for long-term storage; 2 to 8 °C for a few weeks.
• Light, moisture, oxygen: vial sealed, in its box. A cold vial reaches room temperature inside its bag, so condensation forms on the bag and not on the glass.
• Shelf life: 24 months sealed, stored as above; the printed date governs.

A few days of ambient shipping do not degrade a sealed lyophilized cake. The general rules are in lyophilized peptides: storage and shelf life.

Because the name is short and the search volume is large, "GLOW" appears on listings that have nothing to do with a lyophilized peptide vial. Four checks separate a reagent from a name:

1. The three masses are stated (10 / 50 / 10 mg). "GLOW 70 mg" alone is a name.
2. The COA shows three peaks, three masses and three purity figures, from a named laboratory, and can be verified on that laboratory's site.
3. The tested vial in the COA photo wears the supplier's label, with the lot number that will be printed on the vial you receive.
4. The page describes the reagent only. Composition, purity documentation, storage, and "research use only" in plain sight. A page that describes anything else is a page that can disappear with an order in transit.

The complete method, one check at a time, is in how to check a peptide supplier.