Six of the seven vendors we compared in September sell KPV in vials, and Peptide Plugs documents its testing best: its product page shows a September 2026 test with a lot, a Freedom Diagnostics accession code, purity and measured content. PSPeptides and Alpha Pro Peptides also post KPV certificates with a named lab and lot. Swiss Chems sells KPV only as capsules, and no vendor has independent Finnrick data for KPV.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice.
Our criterion: a KPV-specific COA with a named lab and lot number beats a generic "third-party tested" claim. We don't test products; we check what each vendor publishes.
Regulatory status of KPV
- FDA: KPV isn't an approved drug. FDA's Category 2 compounding page (content current as of April 22, 2026) lists it among nominations "withdrawn by the nominators." FDA's note says it "has not identified any human exposure data on drug products containing KPV administered via any route of administration."
- July 2026 advisory vote: FDA's Pharmacy Compounding Advisory Committee voted 8 yes, 6 no, 1 abstaining to recommend KPV for the 503A bulks list (RAPS; Restore Health Consulting). It's non-binding and covers licensed pharmacy compounding, not research-use sales. We found no FDA decision as of September 26, 2026.
- WADA: the 2026 Prohibited List doesn't name KPV (2026 list text). Its S0 section prohibits substances "with no current approval by any governmental regulatory health authority for human therapeutic use."
- DEA: not on DEA's controlled substances list dated August 27, 2026.
More: are peptides legal? and FDA peptide regulation in 2026.
KPV by vendor
Single-vial prices shown on September 26, 2026, including any displayed sale price. $/mg is price divided by labeled mg. Vendors appear in our editors' order, which isn't sorted by score.
| Vendor | Stocks it | Vial size(s) | Price | $/mg | KPV COA / lab | Review |
|---|
| American Peptides | Yes | 10 mg | $60 (list) | $6.00 | Lot KPV10-0318; lab not shown | Review |
| NextGenPeps | Yes | 10 mg | $42 | $4.20 | Janoshik, Apr 30, 2026, 99.007%; no lot shown | Review |
| PSPeptides | Yes | 10 mg | $39.99 | $4.00 | North American Diagnostics, batch PSP-08212026KP, Aug 27, 2026 | Review |
| Ascension Peptides | Yes | 10 mg | $50.00 | $5.00 | Kovera Labs, batch 20-05260628, May 26, 2026 | Review |
| Peptide Plugs | Yes | 10, 30 mg | $35 / $90 | $3.50 / $3.00 | Freedom Diagnostics, lot 71110L-DK, accession code | Review |
| Swiss Chems | No vial (capsules only) | n/a | n/a | n/a | n/a | Review |
| Alpha Pro Peptides | Yes (stock not shown) | 10 mg | $39.99 | $4.00 | Horizon Analytical, lot AP-3255068, Aug 8, 2026 | Review |
Notes on the table:
- American Peptides: the KPV page lists 10 mg at $60, with an automatic discount showing $45 when we checked. Its COA page links a current file and a superseded one, both for lot KPV10-0318, with no lab shown.
- NextGenPeps: the product page showed $42, down from $52. Its COA library names Janoshik for the April 2026 report.
- PSPeptides: the product page links heavy metals, endotoxin and sterility reports for the current batch. The August certificate reports 99.95% purity and 9.76 mg measured, by HPLC with mass spectrometry.
- Ascension Peptides: the product page lists Kovera Labs (May 2026) and MZ Biolabs (November 2025) batches, with no purity shown on the page (checked September 26, 2026). Regular price is $79.99.
- Peptide Plugs: the product page reports 99.59% purity and 13.23 mg measured, 32.3% over the 10 mg label, plus heavy metals, sterility, endotoxin and fentanyl results. The $21 advertised price is for 10 or more vials. It also sells KPV tablets, which this page doesn't cover.
- Swiss Chems: its peptide catalog lists KPV capsules but no KPV vial, so it's out of scope here.
- Alpha Pro Peptides: the certificate comes from Horizon Analytical, not Freedom Diagnostics, which issues most of its other reports: 99.45% purity by UPLC/MS, 9.88 mg measured.
- Licensed Peptides (added to our list September 28, 2026; not in the table): we couldn't confirm whether it stocks KPV, because its full catalog and prices require a free account (research access, checked September 28, 2026). Review
What is KPV?
KPV is the tripeptide Lys-Pro-Val, the C-terminal end of alpha-melanocyte-stimulating hormone (alpha-MSH), as described in a 2003 study of alpha-MSH peptides. It has been studied in cell and mouse models of inflammation, such as work on uptake through the PepT1 transporter. As FDA's note above says, the agency found no human exposure data.
How to check a KPV COA
- Match the lot on the certificate to your vial label. American Peptides' current file carries an older lot code (0318), so confirm it matches your vial.
- Read the lab name on each PDF. Alpha Pro's KPV certificate comes from a different lab than most of its reports.
- Check identity by mass spectrometry. A three-residue peptide is easy to confuse on HPLC alone.
- Compare measured content to the label. Measured KPV ranged from 9.76 mg to 13.23 mg for 10 mg labels across these certificates.
See how to read a peptide COA, the COA checklist and the reconstitution calculator.
Independent test data
None of the seven vendors we compared had independent Finnrick results for KPV on September 26, 2026. Licensed Peptides, which we added on September 28, 2026, has no Finnrick profile. Finnrick lists ten tests for Swiss Chems, covering BPC-157, ipamorelin and CJC-1295 only, and the other six vendors we compared have no Finnrick tests. Every certificate above was commissioned by the vendor, which chooses the sample it sends. More on community testing: what is Finnrick?
Vendor links
In our editors' order. Each review covers the vendor's policies, red flags and full testing record.
KPV is the fourth component of KLOW blends; see GLOW and KLOW blend vendors.
Bottom line
For KPV, Peptide Plugs has the newest and most checkable documentation and the lowest price per mg on its 30 mg vial. PSPeptides and Alpha Pro Peptides name labs on August 2026 certificates, though PSPeptides' blog publishes human dosing guides, which we count against it. NextGenPeps names Janoshik but shows no lot, Ascension shows no purity on the page, and American Peptides doesn't show the lab. For the full comparison, see best peptide vendors in the USA and third-party tested peptides.
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