Four distinct molecules
Each component acts on its own targets; the blend has no single unified mechanism, and published work on each component does not transfer to the mixture.
≥99% Purity · HPLC 
Independently verified
PASS
- Lot
- RFX-2606-053
- Purity (HPLC)
- 99.4%
- Identity
- LC-MS confirmed
- Tested
- June 2026
- Analysed by
- Independent U.S. laboratory
These are results measured on this lot. Full material specification is in Know your compound.
Regenerative Blend
KLOW
A four-component blend of KPV, GHK-Cu, BPC-157 and TB-500 in a single vial.
$140.00
$70.00 per vial with BOGO
Buy 1, Get 1 Free — sitewide Every second vial is free — applied automatically in the cart.
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- Ships from the US
- Discreet packaging
- Free shipping $100+
Research use only — not for human or veterinary use, diagnostic or therapeutic.
Researchers also added Complete the bench setup
Know your compound
What is KLOW?
KLOW is not a single peptide — it is a blend of four separate compounds supplied together in one vial: KPV, GHK-Cu, BPC-157 and TB-500. Each is an independently characterised molecule with its own published literature, and each is assayed as part of the lot release.
The formulation combines two tripeptides (KPV and the copper complex GHK-Cu) with two longer chains (the 15-residue BPC-157 and the thymosin β4 fragment sold as TB-500). Researchers use blends of this kind to study combinations that would otherwise require reconstituting four vials separately; the literature on the combination itself is far thinner than the literature on each component.
Reflex supplies KLOW as a lyophilized powder for laboratory research use only. Component ratios are stated on the lot Certificate of Analysis. Nothing here describes an approved therapy or a use in humans.
Schematic
- KPV 3 aaC-terminal tripeptide of α-MSH.
- GHK-Cu 3 aaCopper(II) tripeptide complex.
- BPC-157 15 aaSynthetic pentadecapeptide.
- TB-500 (Ac-LKKTETQ) 7 aaAcetylated thymosin β-4 17–23 fragment.
What's in the vial
- 01 KPV C-terminal tripeptide of α-MSH. 3 aa
- 02 GHK-Cu Copper(II) tripeptide complex. 3 aa
- 03 BPC-157 Synthetic pentadecapeptide. 15 aa
- 04 TB-500 (Ac-LKKTETQ) Acetylated thymosin β-4 17–23 fragment. 7 aa
Blend ratio is stated on the lot Certificate of Analysis.
Identity
What the molecule is.
- Classification
- Multi-component peptide blend
- The research category this compound is grouped under.
Verification
How we know the material matches the label.
- Purity
- ≥99% (RP-HPLC, per lot)
- The share of the material that is the target compound, measured by reverse-phase HPLC on every lot — not a blanket brand claim.
- Identity method
- LC-MS confirmed
- Mass spectrometry compares the material against the expected sequence to confirm it is the right molecule.
- Documentation
- Certificate of Analysis, per lot
- The certificate for your specific lot is published before it ships and stays searchable by lot number.
Handling
What arrives, and how it is kept.
- Form
- Lyophilized powder
- The physical state the vial arrives in.
What the literature examines
Studied pathways
Summaries of what published research has investigated. Preclinical unless stated otherwise — not claims about this product.
Component literature
BPC-157 and TB-500 dominate the regenerative-peptide literature; KPV and GHK-Cu are studied in inflammatory and matrix-remodelling contexts respectively.
Certificate of Analysis
Every vial ships with its own report
Not a brand-wide spec sheet — a lot-specific certificate from an independent laboratory, published before the lot ships and searchable by lot number forever.
- Lot-specific HPLC purity and LC-MS identity
- Raw chromatogram attached to the certificate
- Signed by the analysing laboratory
- Permanent public archive, searchable by lot ID
Independent U.S. laboratory
Certificate of Analysis · RFX-2606-053
| Test | Specification | Result |
|---|---|---|
| Purity (HPLC) | ≥ 99.0% | 99.4% |
| Identity (LC-MS) | Conforms | Conforms |
| Appearance | White powder | Conforms |
| Net content | Label claim | Conforms |
Questions
KLOW FAQ
Is KLOW approved by the FDA?
No. KLOW is not an FDA-approved drug and is not approved for human or veterinary use. It is supplied exclusively as a research material for laboratory use, and it is not intended to diagnose, treat, cure, or prevent any disease.
Does this lot come with a Certificate of Analysis?
Yes. Every lot is assayed by an independent U.S. laboratory for purity and identity, and the certificate for the lot you receive is published in our COA library — you can read it before you order.
How is purity determined?
Purity is quantified by reverse-phase HPLC against a reference standard, and identity is confirmed by mass spectrometry. Both results appear on the lot certificate.
How should this be stored?
Lyophilized material is typically stored cold and protected from light. Handling and storage are the responsibility of the receiving laboratory; refer to the lot documentation for specifics.
How does the buy-one-get-one offer work?
Every second vial is free, sitewide and automatically. Add two vials and you pay for one; add six and you pay for three. Compounds can be mixed, there is no code, and there is no limit.
When will my order ship?
Orders are processed promptly and shipped with tracking. Free US shipping applies over $100; Priority shipping is $8.95 otherwise.
The guarantee
99.4% pure — or your money back.
Have any lot independently re-tested. If the results don't match the purity printed on its published certificate, we refund the order in full — no returns, no argument.
Test it yourselfSend any vial to a lab of your choosing.
Published firstThe certificate goes public before the lot ships.
Full refundResults that don't match mean your money back.
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