Photograph · Pen and cartonLot AV-KLW-2609-A
Klow
GHK-Cu + BPC-157 + TB-500 + KPV · 80 mg / 3 mL
VAT included · 1 pen · 80 mg / 3 mL
Sold for research use only. Not a medicine and not authorised for human consumption. Purchasers must be 18+ and confirm intended use at checkout.
- Ships chilled · same-day dispatch before 2 pm
- Free UK shipping over £300
About
What this is
KLOW combines GHK-Cu, BPC-157, TB-500 and KPV in a broad experimental formulation spanning tissue response, extracellular matrix, skin biology and barrier-signalling research. Supplied by the manufacturer as a pre-filled 80 mg / 3 mL dose-dial pen for research use — no reconstitution, no vials, no drawing up. Our evidence records for each component are linked below and graded on the same scale as every compound on this site.
- 01Pre-filled pen — no reconstitution
- 02Identity confirmed by LC-MS per lot
- 03Purity ≥ 99% by HPLC per component
- 04Certificate published against the lot number
Specification
What's in the pen
| Component | Amount | What it is | Evidence · Skin | |
|---|---|---|---|---|
| GHK-Cu | 50 mg | Copper-binding tripeptide | Limited | Record |
| BPC-157 | 10 mg | Synthetic pentadecapeptide | Not graded for this goal | Record |
| TB-500 | 10 mg | Synthetic thymosin β4 fragment (residues 17–23) | Not graded for this goal | Record |
| KPV | 10 mg | Anti-inflammatory tripeptide (α-MSH fragment) | Insufficient | Record |
Amounts are per pen. Where the composition states no split, the component amounts are on the lot certificate.
Device
How the pen works
- 01
Attach a pen needle
Take the cap off, wipe the septum with an alcohol swab and screw a compatible pen needle on until it seats. Use a fresh needle every time and never share a pen.
- 02
Prime
Dial a small test amount, hold the pen needle-up and press the button until a drop appears at the tip. This clears air from the needle and confirms the pen delivers.
- 03
Dial
Turn the dial to the volume you intend to deliver; the window shows the setting in the pen's increments. The dial sets a volume of solution — nothing more.
- 04
Inject
Insert as the pen-needle instructions describe, press the button fully and hold for ten seconds before withdrawing. Remove and bin the needle in a sharps container, recap and refrigerate.
Dosing is not provided; see the research information in the evidence record. These steps describe how the device operates, not how or whether to use its contents.
Certificate of analysis · 4 components tested
Lot AV-KLW-2609-A
Independent test of a sample from lot AV-KLW-2609-A of Klow. Each component is identified by LC-MS and its purity reported separately; endotoxin is measured on the finished solution. Testing says what is in the pen, not whether the combination is safe or does anything in people. How we test
Evidence record · reviewed 16 Sept 2026 · 4 components
What the research says about each component
Each component has its own record. The combination in this pen has not been studied in people, so the grades below are per component, not for the blend.
GHK-Cu
Copper-binding tripeptide
Topical copper peptide with modest cosmetic data; injectable use is untested.
- Overall evidence
- Limited
- Human evidence
- Topical cosmetic use
- Regulatory · jurisdictions on record
- Not authorised
- Not authorised · United Kingdom, United States, European Union, Australia and Canada
- United Kingdom · Not authorised as a medicine; permitted as a topical cosmetic ingredient. · reviewed 1 Sept 2026
- Anti-doping · WADA
- Not on the Prohibited List
GHK-Cu + BPC-157 · Not studied together in people
No human data on the combination, and no human data on injected GHK-Cu alone.
BPC-157
Synthetic pentadecapeptide
Widely sold 'healing peptide' with animal data but no published human trials.
- Overall evidence
- Insufficient
- Human evidence
- Animal / laboratory data only
- Regulatory · jurisdictions on record
- Not authorised
- Not authorised · United Kingdom, United States, European Union, Australia and Canada
- United Kingdom · No marketing authorisation; sold online as a 'research chemical'. · reviewed 1 Sept 2026
- Anti-doping · WADA
- Prohibited at all times
Relevant if you compete in tested sport.
BPC-157 + TB-500 · Not studied together in people
The most commonly co-marketed 'healing stack'. There are no human data for either peptide alone, let alone together; combining two angiogenic agents of unknown purity compounds the uncertainty rather than the benefit.
TB-500
Synthetic thymosin β4 fragment (residues 17–23)
Thymosin β4 fragment sold for healing; no human trials of the fragment.
- Overall evidence
- Insufficient
- Human evidence
- Animal / laboratory data only
- Regulatory · jurisdictions on record
- Not authorised
- Not authorised · United Kingdom, United States, European Union, Australia and Canada
- United Kingdom · No marketing authorisation; sold online as a 'research chemical'. · reviewed 1 Sept 2026
- Anti-doping · WADA
- Prohibited at all times
Relevant if you compete in tested sport.
TB-500 + KPV · Not studied together in people
Blended together in the Klow pen. No human data on the combination; TB-500 has no human data at all and KPV has none by any route.
KPV
Anti-inflammatory tripeptide (α-MSH fragment)
α-MSH tripeptide with anti-inflammatory animal data and no human trials.
- Overall evidence
- Insufficient
- Human evidence
- Animal / laboratory data only
- Regulatory · jurisdictions on record
- Not authorised
- Not authorised · United Kingdom, United States, European Union, Australia and Canada
- United Kingdom · No marketing authorisation; sold online as a 'research chemical'. · reviewed 16 Sept 2026
- Anti-doping · WADA
- Not on the Prohibited List
Fit
Who this is for
Skin and surface repair with an inflammatory component — the broadest blend in the range.
- Skin quality plus slow-healing marks, scars or irritation
- Repair goals where inflammation is part of the picture
- Wanting skin and recovery support in one pen
Check your fit
The Peptide Checkup maps your goal and history against the evidence for this pen and tells you if it is a poor fit — even after you have bought it.
Check your fit · 7 minutesAlso in the range · by shared goal, then bestsellers
