Three compounds totalling 70 mg: 50 mg GHK-Cu, 10 mg TB-500 and 10 mg BPC-157. The 70 refers to combined mass across all three, not to any one of them and not to a strength or grade.

Is GLOW 70 the same from every supplier?

No. GLOW is a market name, not a defined formulation — no standards body controls it. Two vials sold under the same name can carry different compounds or different mass splits, so the certificate and the stated split are the only reliable identification.

What is the difference between GLOW and KLOW?

KLOW adds a fourth compound, KPV, and totals 80 mg rather than 70 mg. Both are named blends built on GHK-Cu; the practical difference is the extra component and the extra mass, which is why they are priced and analysed separately.

Why does the mass split matter more than the total?

Because the three compounds have very different molecular weights, so equal masses are wildly unequal molecule counts. GHK-Cu is 71% of GLOW by mass but about 93% of it by moles — the total tells you almost nothing about the mixture's actual composition.

Identification·6 min read

GLOW 70 — what is actually in the vial

GLOW 70 is 70 mg across three compounds: 50 mg GHK-Cu, 10 mg TB-500, 10 mg BPC-157. The mass split defines the vial — not the name, which no standards body controls.

GLOW 70 is a three-compound research blend totalling 70 mg per vial: 50 mg GHK-Cu, 10 mg TB-500 and 10 mg BPC-157. The number is the total mass, not a potency rating. No standards body owns the name, so the compound list and mass split are what actually define it.

By the Bench Grade Research Team · Last updated October 11, 2026

What the name does and does not tell you

GLOW 70 is a market name. No pharmacopoeia, standards body or registry controls it, which means it carries no guaranteed formulation the way a CAS number or an INN does. Two vials sold under that name by different suppliers can legitimately contain different compounds in different proportions, and neither supplier is doing anything unusual.

The number is the only part of the name that is arithmetic rather than branding: 70 is the combined mass in milligrams of everything in the vial. It is not a potency rating, not a purity figure and not a grade. A 70 mg blend is not stronger than a 10 mg single compound in any meaningful sense — it simply contains more total material spread across more molecules.

The composition, stated plainly

GLOW 70 composition, and what it looks like by mole rather than by mass
Compound	Mass	Share by mass	Molecular weight	Share by moles
GHK-Cu	50 mg	71.4%	402.92 g/mol	93.2%
TB-500	10 mg	14.3%	4963.44 g/mol	1.5%
BPC-157	10 mg	14.3%	1419.55 g/mol	5.3%
Total	70 mg	100%	—	100%

The last column is the part worth sitting with, because it is not intuitive and almost nobody states it. GHK-Cu is 71% of the vial by mass, which already makes it the dominant component. By molecule count it is closer to 93%.

The reason is molecular weight. GHK-Cu is a tripeptide with a copper ion, 402.92 g/mol. TB-500 is a 43-residue protein at 4963.44 g/mol — more than twelve times heavier per molecule. So although the vial contains the same 10 mg of TB-500 as it does BPC-157, and only five times as much GHK-Cu by mass, the actual molecule counts are roughly 124 micromoles of GHK-Cu against 7 of BPC-157 and 2 of TB-500.

What a blend certificate can and cannot establish

A single-compound vial has a straightforward certificate: one mass-spectrometry result confirms identity, one HPLC figure describes purity. A blend complicates both, and the complication is worth understanding before reading one.

Identity is answerable. Mass spectrometry can confirm that each expected molecular weight is present, and the three components here differ enough in mass — 403, 1420 and 4963 g/mol — to be distinguished without ambiguity.
A single purity percentage is ambiguous. Area percent across a chromatogram containing three intended compounds does not, by itself, say which peak is which or whether the ratio matches the label.
The mass split is the hard part. Confirming that a vial contains 50/10/10 rather than 60/5/5 requires quantitation against reference standards, which is a different and more expensive analysis than an identity-and-purity run.
So the certificate that means most for a blend is one reporting each component separately. A single blended figure is not wrong, it is simply answering a narrower question than most readers assume.

Published certificates for this and other compounds are in the COA library, where the lot number on the vial can be matched against the analysis for that specific batch.

How GLOW differs from KLOW

The two names are frequently confused because they are one letter apart and share most of their composition. KLOW adds KPV — a three-residue peptide of 342.43 g/mol corresponding to the C-terminal fragment of alpha-melanocyte-stimulating hormone — and totals 80 mg rather than 70.

That is the entire difference: one additional compound and ten additional milligrams. Both are built around GHK-Cu as the dominant component by a wide margin. Anyone comparing the two on total milligrams alone is comparing 70 to 80 and learning very little; the compound list is the informative part.

Handling notes that follow from the composition

Because GHK-Cu dominates, the blend inherits its handling profile more than either of the other two. GHK-Cu is a copper complex, which means it is more light-sensitive than a plain peptide and pH-dependent in a way peptides are not: under sufficiently acidic conditions the copper dissociates, leaving free peptide and free copper rather than the intended compound. Darker storage genuinely matters here rather than being generic advice.

TB-500 contributes the one oxidation-prone residue in the vial. Its sequence contains a methionine, the most oxidation-prone of the twenty amino acids; oxidation adds 16 Da and typically shows on a chromatogram as a shoulder on the main peak rather than a separate one. BPC-157 contains neither methionine nor cysteine, so it adds no comparable route.

Evidence status

Each constituent has its own preclinical literature and none is approved for human use in the United States. No controlled study has examined these three compounds administered together, so a blend carries each component's uncertainty plus untested interaction between them — it does not carry more evidence than its parts. BPC-157 was additionally placed in the FDA's Category 2 of bulk drug substances, a regulatory finding of public record independent of any supplier's manufacturing claims.

A blend can be well made and still be poorly characterised. The certificate establishes what is in the vial; it says nothing about what the contents do, and that is as true here as anywhere else in this catalog.

References

Primary literature for the compounds discussed above. Links open the record on PubMed.

The potential of GHK as an anti-aging peptide Pickart L, et al. Aging Pathobiol Ther. 2022. PMID 35083444 → · summary
Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data Pickart L, et al. Int J Mol Sci. 2018. PMID 29986520 → · summary
BPC 157 and Standard Angiogenic Growth Factors. Gastrointestinal Tract Healing, Lessons from Tendon, Ligament, Muscle and Bone Healing Sikiric P, et al. Curr Pharm Des. 2018. PMID 29998800 → · summary
The promoting effect of pentadecapeptide BPC 157 on tendon healing involves tendon outgrowth, cell survival, and cell migration Chang CH, et al. J Appl Physiol. 2011. PMID 21030672 → · summary
Thymosin beta 4 improves dermal burn wound healing via downregulation of receptor of advanced glycation end products in db/db mice Xu TJ, et al. Biochim Biophys Acta. 2014. PMID 25230158 → · summary
Pentadecapeptide BPC 157 (PL 14736) improves ligament healing in the rat Cerovecki T, et al. J Orthop Res. 2010. PMID 20225319 → · summary
Gastric pentadecapeptide BPC 157 as an effective therapy for muscle crush injury in the rat Novinscak T, et al. Surg Today. 2008. PMID 18668315 → · summary
Achilles detachment in rat and stable gastric pentadecapeptide BPC 157: promoted tendon-to-bone healing and opposed corticosteroid aggravation Krivic A, et al. J Orthop Res. 2006. PMID 16583442 → · summary

Primary sources

Frequently asked questions

What is in GLOW 70?: Three compounds totalling 70 mg: 50 mg GHK-Cu, 10 mg TB-500 and 10 mg BPC-157. The 70 refers to combined mass across all three, not to any one of them and not to a strength or grade.
Is GLOW 70 the same from every supplier?: No. GLOW is a market name, not a defined formulation — no standards body controls it. Two vials sold under the same name can carry different compounds or different mass splits, so the certificate and the stated split are the only reliable identification.
What is the difference between GLOW and KLOW?: KLOW adds a fourth compound, KPV, and totals 80 mg rather than 70 mg. Both are named blends built on GHK-Cu; the practical difference is the extra component and the extra mass, which is why they are priced and analysed separately.
Why does the mass split matter more than the total?: Because the three compounds have very different molecular weights, so equal masses are wildly unequal molecule counts. GHK-Cu is 71% of GLOW by mass but about 93% of it by moles — the total tells you almost nothing about the mixture's actual composition.

Compounds discussed in this guide

Who publishes this guide

Who sells it: Bench Grade Peptides LLC, a US supplier of lyophilized synthetic peptides for laboratory research use only. It works with US manufacturing partners rather than running a facility of its own. Is Bench Grade Peptides legit? →
Certificates of Analysis: 134 third-party Certificates of Analysis covering 36 of 37 live products, published per lot in a public library anyone can read before ordering. A very recent lot can appear a few days after it enters the catalogue. COA library →
Ships from: Florida, by UPS, to US addresses only (no international shipping). The registered address in Dover, Delaware is the legal address only. Shipping →
Use: For laboratory research use only — not for human or veterinary use. Not a drug, supplement or medical device. Compliance and research use →

All products discussed in this guide are supplied by Bench Grade Peptides for laboratory research use only. Not for human or veterinary use.