GLOW is a three-peptide research blend (GHK-Cu, BPC-157, TB-500), not one molecule. See CAS anchors, Peptide Foundry’s 50/10/10 mass ratio, and how to match a lot COA. Research use only.
GLOW is a market label for a co-lyophilized three-peptide research material combining GHK-Cu (CAS 49557-75-7), BPC-157 (CAS 137525-51-0), and TB-500 (CAS 77591-33-4). It is not a single CAS-registered molecule.
If you found “glow peptide,” “glow blend,” or “glow 50” in a catalogue, a spreadsheet, or a vendor listing, the useful questions are which three components are present, what mass of each is in the vial, and how the lot is documented. Listing names vary between suppliers. Registry numbers and lot certificates do not.
This page covers what the designation means, Peptide Foundry’s fixed mass ratio, per-component identity anchors, and how to match a vial lot to a third-party certificate of analysis.
Key points
- GLOW is a blend label, not a single CAS substance.
- Peptide Foundry vial convention: GHK-Cu 50 mg + BPC-157 10 mg + TB-500 10 mg (label
50mg/10mg/10mg; 70 mg total peptide content).- Each component has its own CAS, formula, and molar mass — see the identity table below.
- Lot certificates (for example ILS Laboratories full QC on current lots) can be verified with the issuing laboratory’s access code.
- Research use only — not for human or veterinary use.
What does “GLOW peptide” mean?
It is a catalogue label, not a chemical name. No naming authority — IUPAC, CAS, or WHO — registers “GLOW” as a substance.
That is why the same three-letter word appears inconsistently across sources: glow peptide, glow blend, glow stack, glow 50, GLOW. A label that exists only in catalogues can be spelled several ways, reused, or applied to different mass splits. None of that tells you what is in a particular vial.
In practice, most market listings that use the GLOW name point at a three-component co-lyophilized preparation built from GHK-Cu, BPC-157, and TB-500. The components are real, individually registered peptides. The blend name is not. Treat “GLOW” the way you would treat any other vendor shorthand: useful for search and inventory, useless as an identity proof on its own.
How can I confirm what a GLOW listing refers to?
Do not stop at the marketing name. Three checks, in order of usefulness:
- Name the three components and their CAS numbers. GHK-Cu is CAS 49557-75-7; BPC-157 is CAS 137525-51-0; TB-500 (as listed for thymosin β-4 in this catalogue) is CAS 77591-33-4. Each resolves in a public registry independently of any supplier’s copy.
- Read the labeled masses. Peptide Foundry’s GLOW is labeled
50mg/10mg/10mg— 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500. Other vendors may use a different split under the same marketing name. Compare certificates and labels, not acronyms. - Read the lot certificate. A COA ties one physical lot to measured purity and identity. A catalogue name cannot do that.
Product names are marketing artefacts. CAS numbers and lot records are not. When a listing name is reused across vendors, the registry numbers and the certificate are the continuity between what you ordered and what you received.
What are the three components?
Each component is a separately registered research material. The table below is the identity set Peptide Foundry uses for GLOW; values match the catalog chemistry table and the live product blend panel.
| Component | CAS# | Formula | Molar mass | Mass per vial |
|---|---|---|---|---|
| GHK-Cu | 49557-75-7 | C14H22CuN6O4 | 401.91 g/mol | 50 mg |
| BPC-157 | 137525-51-0 | C62H98N16O22 | 1419.55 g/mol | 10 mg |
| TB-500 | 77591-33-4 | C212H350N56O78S | 4963.44 g/mol | 10 mg |
GHK-Cu
GHK-Cu is a copper-complexed tripeptide. The CAS number 49557-75-7, formula C14H22CuN6O4, and molar mass 401.91 g/mol are the anchors. Common vendor mass figures sometimes differ by a couple of units; Peptide Foundry’s catalog uses the formula-consistent 401.91 value. Keep the discussion at chemical identity — the copper complex is a structural fact, not a clinical claim.
BPC-157
BPC-157 is a synthetic pentadecapeptide registered as CAS 137525-51-0, formula C62H98N16O22, molar mass 1419.55 g/mol. It appears both as a single listing and as a component in multi-peptide blends. Match the CAS and mass on the certificate; do not rely on the nickname alone.
TB-500
TB-500 is the market name commonly applied to material listed under CAS 77591-33-4 (thymosin β-4), formula C212H350N56O78S, molar mass 4963.44 g/mol. Market naming is noisy — “TB-500” and full Tβ4 language get used loosely across vendors. The practical rule is the same as for every other research peptide: match CAS + molar mass on the COA, not the nickname on the storefront.
What fixed ratio does Peptide Foundry use?
Peptide Foundry supplies GLOW as a single lyophilised vial with a fixed mass ratio:
| Component | Mass per vial | Share of labeled peptide content |
|---|---|---|
| GHK-Cu | 50 mg | 50 / 70 (~71%) |
| BPC-157 | 10 mg | 10 / 70 (~14%) |
| TB-500 | 10 mg | 10 / 70 (~14%) |
| Total | 70 mg | 100% |
The size attribute on the product listing is 50mg/10mg/10mg. That string is a mass label, not a molar ratio. The three components differ in molar mass by more than an order of magnitude (roughly 402, 1,420, and 4,963 g/mol), so equal milligram amounts are not equal molar amounts. For assay math, convert with the molar masses in the identity table rather than treating the milligram ratio as stoichiometric.
Other vendors may publish a different split under the same marketing name. A “5:1:1” shorthand sometimes appears in secondary sources; it is a rough mass description, not a registry definition. Compare the labeled milligrams and the certificate, not the brand word.
Specifications
| Property | Value |
|---|---|
| Listing name | GLOW |
| Type | Three-peptide co-lyophilized blend (not a single CAS substance) |
| Components | GHK-Cu, BPC-157, TB-500 |
| Labeled mass ratio | 50 mg / 10 mg / 10 mg (70 mg total) |
| Physical form | Lyophilised powder |
| Appearance | White to off-white solid |
| Purity specification | ≥99% by HPLC (lot-specific measured value on COA) |
| Documentation | Lot-specific third-party COA |
How do you verify a GLOW lot COA?
Most suppliers publish a purity specification. A certificate of analysis is stronger when it is lot-specific, names the laboratory, and can be checked outside the supplier’s own site.
What a blend COA should show
- A lot number that matches the vial.
- Clear attribution of the three components (or identity data that can be tied to them).
- Purity method and wavelength (for example HPLC @ 214 nm).
- Net peptide content versus the labeled mass.
- Where claimed: heavy metals, sterility, endotoxin, and illicit-substance screens.
A red flag is a single “blend purity %” with no lot number, no laboratory name, and no way to confirm the document exists outside the seller’s PDF host.
Worked example — lot FO996
As published on the current Peptide Foundry GLOW listing at the time of writing:
| Field | Value |
|---|---|
| Lot | FO996 |
| Size | 50mg/10mg/10mg |
| Laboratory | ILS Laboratories (ISO/IEC 17025 narrative) |
| Received / tested | 16 Jul 2026 / 19 Jul 2026 |
| Purity | 99.65% (HPLC @ 214 nm) |
| Net peptide content | 73.89 mg |
| Identity | HPLC-RTM — Pass |
| Fentanyl screen | Not detected |
| Heavy metals (ICP-MS) | All Pass |
| Sterility (PCR) | No growth |
| Endotoxin (USP <85>) | NMT 0.05 EU/mL |
| Access code | QY5NMBMV |
Three steps that travel with any lot, not just this one:
- Match the lot number on the vial to the lot on the certificate.
- Confirm the three components and labeled masses against the certificate and the product label.
- Verify the access code on the issuing laboratory’s own portal when one is provided — not only by opening a PDF hosted by the supplier.
That last distinction matters. A PDF on a supplier site is a document the supplier controls. A record you can pull from the testing laboratory is not. When evaluating any supplier in this category, independent verification is the question worth asking. Older third-party GLOW certificates also exist in Peptide Foundry’s lot archive; always prefer the certificate that matches the lot in hand.
Blend vial versus three separate vials
The three materials are the same research substances whether they arrive in one co-lyophilized vial or three singles. A blend fixes the mass stoichiometry and reduces the number of vials in inventory for multi-analyte workflows that use this ratio. Separate vials are the better fit when an assay needs independent concentration control of each component.
That is a logistics distinction, not a protocol. How you prepare solutions for a specific assay belongs to your institution’s SOPs, not to a supplier article.
GLOW versus KLOW
Both listings share the GHK-Cu / BPC-157 / TB-500 core. KLOW adds a fourth component, KPV. If you are comparing four-component versus three-component market labels, read the component list and the CAS table on each certificate rather than treating the rhyme as identity. Full side-by-side ratios and lot examples: GLOW vs KLOW research blends.
| Listing | Components |
|---|---|
| GLOW | GHK-Cu, BPC-157, TB-500 |
| KLOW | GHK-Cu, BPC-157, TB-500, KPV |
How should it be stored and handled?
Standard laboratory practice for lyophilised synthetic peptides applies to multi-peptide vials as well:
- Storage. Sealed vials at −20°C, protected from light and moisture. Lyophilised material is substantially more stable than solution.
- Temperature excursions. Brief ambient exposure in transit is normal for lyophilised material. Return vials to −20°C on arrival.
- Freeze–thaw. Repeated freeze–thaw cycles degrade peptides. Storage stability and handling frequency are separate facts on a certificate for a reason.
- Traceability. Keep the lot number with the material. Lot number is what ties a vial back to its certificate; material separated from its lot number cannot be traced to any analysis.
Specifics beyond this depend on your assay and your institution’s standard operating procedures, which take precedence over any supplier guidance.
Common questions
Is GLOW a single peptide?
No. GLOW is a market label for a three-peptide co-lyophilized blend. There is no single CAS registry entry for “GLOW” as a substance. Identity is the three component CAS numbers plus the labeled mass of each.
What does 50mg/10mg/10mg mean?
It is the mass of each component in one Peptide Foundry vial: 50 mg GHK-Cu, 10 mg BPC-157, and 10 mg TB-500 (70 mg total labeled peptide content). It is a mass label, not a molar ratio.
How do I verify what I received?
Match the lot number on the vial to the COA, confirm the three components and masses, and use the laboratory access code on the issuing lab’s verification portal when one is provided. For current ILS-tested Peptide Foundry lots, that means the ILS access code on the certificate — for lot FO996, QY5NMBMV.
How does GLOW differ from buying the three materials separately?
Same three research materials; the blend fixes the mass ratio in one vial. Use separate vials when you need independent control of each concentration. Neither format changes the RUO boundary.
Can this be used outside a laboratory?
No. This material is supplied for in-vitro and laboratory research by qualified researchers and for no other purpose. It is not a drug, not a supplement, and not for human or veterinary use.
For the current lot certificate and product specifications, see the GLOW research product page. Related library reading: What is the KLOW research blend?, GLOW vs KLOW, GHK-Cu research identity, BPC-157 vs TB-500, How to verify a multi-peptide blend COA, How to read a research-peptide COA, USA research-peptide vendor criteria, What is GLP-3RT? (catalogue name versus CAS), and Is glutathione a peptide?.
Research use only. Nothing on this page describes or implies use in humans or animals.