Peptide data sheet
KLOW Stack
Skincare · KLOW · KLOW blend
Verdict
unprovenThe unproven label is about the STACK: while individual components like GHK-Cu carry real topical cosmetic data, no controlled study has tested the KLOW combination as a combination, so its stack-level benefits and interactions are not established.
By MrPepTalks Editorial
Reviewed for scientific accuracy · research information, not medical advice
Last updated Reviewed
Quick answer
KLOW is a research-grade blend of four peptides — GHK-Cu, KPV, BPC-157, and TB-500 — commonly researched for skin and tissue-repair interest. Each part has its own evidence base (strongest for topical GHK-Cu), but the KLOW stack itself has never been tested as a stack in humans, and its components are not FDA-approved. It is sold for laboratory research use only.
- Class
- Multi-peptide blend (GHK-Cu + KPV + BPC-157 + TB-500)
- Half-life
- not characterized for the blend (components differ; reported)
- FDA status
- Not FDA-approved. KLOW and each of its components are sold for laboratory research use only and are not approved for human use.
- WADA banned?
- Yes
Which form actually works?
Blended vial (research-grade)
Unproven
The way KLOW is typically sold — the four peptides pre-combined. Convenient, but the convenience is the point: no study has evaluated this specific four-part combination as a whole, so its stack-level picture is inferred from the separate parts, not measured.
Individual components studied separately
Promising
The parts have more research context on their own than the blend does. Topical GHK-Cu in particular carries real human cosmetic data. But separate-component evidence is not the same as evidence for the stack, and one component (TB-500) is on the WADA banned list.
Third-Party Testing & Certificate of Analysis (COA)
A certificate of analysis (COA) is a lab document that reports what a specific batch of material actually contains. Reputable research suppliers publish one for every batch, tied to a lot number you can match against the vial you received.
- HPLC — purity
- High-performance liquid chromatography reports purity as a percentage: how much of the sample is the intended compound rather than impurities.
- Mass spectrometry (MS) — identity
- Mass spectrometry confirms identity by measuring the sample's molecular mass, so it matches the peptide the label names.
It also matters who ran the test. In-house results come from the seller's own lab; an independent third-party lab has no stake in the result, so its COA generally carries more weight. Look for a named testing laboratory, a batch or lot number, and a test date that lines up with the vial in hand.
New to reading one? This guide walks through a COA line by line: how to read a peptide COA.
Sources
- Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide. Int J Mol Sci, 2018.
- Dalmasso G et al. PepT1-mediated tripeptide KPV uptake reduces intestinal inflammation. Gastroenterology, 2008.
- Sikiric P et al. Stable gastric pentadecapeptide BPC 157: review of preclinical research. Curr Pharm Des, 2018.
- World Anti-Doping Agency Prohibited List (TB-500 / thymosin beta-4 growth-factor class).
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