GLOW vs KLOW — what's the difference?
GLOW and KLOW are two of the most popular multi-peptide research blends in the UK. They share the same core stack — but KLOW adds a fourth peptide. If you've ever wondered which to pick for your research, this guide breaks down exactly what's in each, why KPV makes the difference, and how to decide.
Side-by-side composition
| Peptide | GLOW | KLOW |
|---|---|---|
| GHK-Cu | 50mg | 50mg |
| BPC-157 | 10mg | 10mg |
| TB-500 | 10mg | 10mg |
| KPV | — | 10mg |
In short: KLOW = GLOW + 10mg KPV. Everything else is identical.
GLOW — the original 3-peptide stack
GLOW pairs GHK-Cu (a copper-binding tripeptide studied for skin and tissue signalling) with BPC-157 and TB-500 — two of the most-researched repair peptides. The combination is studied in laboratory settings for synergistic effects on tissue regeneration models.
KLOW — adds KPV for an inflammatory dimension
KLOW takes the GLOW stack and adds KPV (Lysine-Proline-Valine), a tripeptide derived from alpha-MSH and widely studied for anti-inflammatory pathway research, particularly in gut and skin models. The result is a broader blend covering repair, signalling and inflammation modulation in a single vial.
Which one should you pick?
- Choose GLOW if your research is focused on the classic repair/regeneration triad and you don't need KPV.
- Choose KLOW if you want the broader 4-peptide profile with an inflammation-focused component included.
- Cost-per-mg: KLOW is slightly more expensive per vial (it has more peptide content), but cheaper than buying KPV separately alongside GLOW.
Reconstitution & storage
Both blends ship lyophilised. Reconstitute with bacteriostatic water (we stock 10ml vials), store reconstituted product at 2–8°C and use within 28 days. Use our peptide calculator to work out volumes based on the total mg in each blend.
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View full shopFrequently asked questions
What's the difference between GLOW and KLOW?
GLOW is a 3-peptide blend containing GHK-Cu (50mg), BPC-157 (10mg) and TB-500 (10mg). KLOW is the same three peptides PLUS KPV (10mg) — a fourth peptide added for its anti-inflammatory research profile.
Is KLOW better than GLOW?
Not better — broader. KLOW adds KPV, a tripeptide studied for inflammatory pathway modulation. If your research focus includes inflammation alongside repair and signalling, KLOW gives you the extra peptide. If you only need the core repair stack, GLOW is sufficient.
What is KPV and why is it added to KLOW?
KPV (Lysine-Proline-Valine) is a tripeptide derived from alpha-MSH. In research it's studied for its anti-inflammatory signalling, particularly in gut and skin models. KLOW includes it to extend the blend's research scope.
Are GLOW and KLOW reconstituted the same way?
Yes — both ship lyophilised and are typically reconstituted with bacteriostatic water. Use our peptide calculator to work out volumes based on your target concentration.
Which blend is more popular in UK research?
Both are popular, but GLOW has the longer track record as the original 3-peptide repair stack. KLOW is the newer evolution and has grown quickly among researchers wanting KPV's additional profile in a single vial.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.