The best answer to where to buy KPV peptide for research is a supplier that publishes a lot-matched certificate for the exact vial you order. Kylo Peptides sells 5 mg (44.95)and 10mg(59.95) lyophilized KPV vials, each with its own lot-numbered certificate of analysis.
Its latest certificates, from Optiq Health Labs, report 99.7% purity for the 5 mg vial and 99% for the 10 mg vial, with identity confirmed by LC-MS. American Peptides and Nationwide Peptides also list KPV as a research reagent.
We compared all three listings using the same four checks: lot number, test methods, testing lab, and listed price. Many KPV listings advertise “99% pure,” so the certificate behind that number is the first thing to check, before the price.
Quick Answer
- Where to buy KPV peptide: Kylo Peptides (5 mg at $44.95, 10 mg at $59.95), American Peptides (10 mg at $60.00), and Nationwide Peptides (5 mg at $50, 10 mg at $65) all list KPV with a published certificate of analysis (COA).
- What it is: KPV is a three-amino-acid peptide, lysine-proline-valine, the last three amino acids of the hormone alpha-MSH.
- Research focus: cell and animal studies of inflammatory signaling, including NF-κB and the PepT1 transporter.
- Regulatory status: KPV is sold for laboratory research only. It is not FDA-approved as a drug.
Quick Comparison Table
All three suppliers offer KPV peptide as a lyophilized research vial, label it for laboratory use, and provide a third-party COA. They differ in vial sizes, how much each certificate tests, and how much molecular detail the listing includes. Prices are single-vial list rates as of October 6, 2026, before any member, coupon, or volume pricing.
| Supplier | KPV Available | Research-Use Label | Purity Documentation | Lot-Specific COA | Identity Testing | Independent Testing | Product Details |
|---|---|---|---|---|---|---|---|
| Kylo Peptides | Yes, 5 mg and 10 mg | Yes | RP-HPLC | Yes, one lot per size | LC-MS | Optiq Health Labs | $44.95 / $59.95. Formula, weight, and CAS listed |
| American Peptides | Yes, 10 mg | Yes | RP-HPLC | Yes | LC-MS/MS | Bioviridian | $60.00. Formula, weight, and CAS listed; safety data sheet on page |
| Nationwide Peptides | Yes, 5 mg and 10 mg | Yes | HPLC-UV | 10 mg: yes. 5 mg report shows no lot | LC-MS | Freedom Diagnostics | $50 / $65. No formula or CAS on listing |
What Researchers Should Know About KPV Before Comparing Suppliers
KPV is short for Lys-Pro-Val, a tripeptide built from lysine, proline, and valine. A KPV peptide supplier is selling a very small, well-defined molecule, which works in the buyer’s favor. A small molecule with a known mass is simple for a lab to confirm, so a weak certificate has nowhere to hide.
KPV at a Glance
| Detail | Reference value |
| Full name | KPV, Lys-Pro-Val |
| Sequence | Three amino acids: K-P-V |
| Origin | C-terminal end of alpha-MSH, positions 11 to 13 |
| Molecular formula | C16H30N4O4 (free base) |
| Molecular weight | 342.43 g/mol |
| CAS number | 67727-97-3 |
| Common research format | Lyophilized powder in a sealed vial |
| Classification | Research reagent |
The formula and weight are for the free base. Getting and colleagues describe KPV as the C-terminal peptide of alpha-MSH, also written MSH 11-13 or alpha-MSH (11-13). A supplier page for a KPV 5mg or KPV 10mg vial should print these same values.
Why Molecular Identity Matters When Ordering KPV
A product name alone is not sufficient evidence of identity. Think of the name as the label on a jar and the molecular data as the ingredient list. So a listing should include the sequence, the salt or form where applicable, the molecular weight, and the CAS number.
The KPV Buying Decision Starts With Documentation, Not Price
Buying KPV peptide well starts with one question: what evidence does this vendor hand you before you pay? In the peptide market, the COA is the receipt. A supplier that shows the receipt up front, tied to a numbered lot and a named lab, has already answered most of what a careful buyer would ask.
The Five Documents/Details to Check Before Ordering
- Product specification: sequence, formula, weight, form, and quantity.
- Lot number: shown on the KPV listing, the vial label, or both.
- COA: the full report, as a file you can open.
- Testing laboratory information: a lab name and a report number.
- Product-to-lot traceability: a clear line from the vial in your hand to that report.
Why a Generic COA Is Different From a Lot-Matched COA
A generic COA describes a product type, or some batch made at some point. A lot-specific COA ties the result to the production lot that filled your vial. Only the second one tells you about the material on your bench, so match the lot number on the report to the one on the label.
What Should Be Visible Before You Place an Order?
Run this pre-order list against the page. All twelve items should be visible before checkout:
- Product name, sequence and molecular weight
- Lot number, purity result, and identity result
- Testing method, testing laboratory and test date
- COA availability, storage conditions and a research-use statement
How to Read a KPV Peptide COA
Reading a KPV COA gets faster once you know the order. Start with the lot number, confirm the molecule, check the purity figure, and finish with who ran the tests. Four of the five KPV certificates we opened on October 6 print a lot number, and one shows N/A in that field.
Start With the Product and Lot Number
Follow one lot number across three places: the product page, the vial label, and the COA. Kylo’s COA library lists KPV 5 mg under lot SD-260726-1 and KPV 10 mg under lot SD-260729-1. The lot ID on your vial should match one of them.
HPLC: What the Purity Number Actually Tells You
HPLC separates what is in the sample and measures how much of it is the main compound. A purity percentage is that share. The number means little without the report behind it, so look for the result on your own lot, with the method named.
LC-MS: Confirming Molecular Identity
HPLC assesses purity. Mass spectrometry weighs the molecule and confirms that it is KPV. On the American Peptides report, the mass peak sits at 343.2, the reading expected for KPV carrying one extra proton.
Testing Laboratory and Report Identification
Look for a lab name, a report or accession number, a test date, and any accreditation details, such as ISO/IEC 17025. Then verify the report yourself. Bioviridian takes a web verification code, and Freedom Diagnostics takes a search code.
A Simple KPV COA Verification Workflow
- Find the lot number.
- Find the matching COA.
- Confirm product identity.
- Review the purity result.
- Check the laboratory and methods.
- Review additional quality tests.
- Confirm the documentation corresponds to the purchased lot.
Beyond Purity: The Quality Checks That Matter for KPV Research
KPV purity is one line on the certificate; a full quality profile includes several more. A vial can be very pure and still hold the wrong amount, or carry something a purity test never looks for. Seven checks cover the ground, and a good report shows which of them were run.
Identity Testing
An identity test confirms the molecule in the vial is KPV, usually by its mass, and LC-MS is the common method.
Purity Testing
A purity test shows how much of the analyzed material is the intended compound, reported by HPLC as a percentage.
Net Content
A net content line compares the stated quantity with the amount measured in the vial. Kylo’s and American Peptides’ reports include this line, as does Nationwide’s 10 mg report.
Heavy-Metal Testing
A heavy-metal screen looks for metal contaminants, which can skew sensitive assays. Kylo’s and American Peptides’ KPV reports include it, and Nationwide’s do not.
Endotoxin Testing
Bacterial endotoxin can set off responses in cell cultures on its own, which muddies any inflammatory-signaling readout. An endotoxin line on the report tells you the lot was screened for it.
Sterility / Microbiological Testing
Sterility testing is relevant for cell-based work, where microbial growth ruins a plate. Of the certificates we opened, only Kylo’s print a sterility line.
Batch Consistency
One good result describes one lot. A run of dated certificates across lots shows how production holds up over time.
How to Compare KPV Suppliers on the Things That Actually Matter
Comparing KPV suppliers gets easier with a fixed list, and ours is the 10-Point KPV Supplier Screen. Each point is one question, and a supplier either answers it on the page or leaves you guessing. You can run all ten against any vendor before the price enters the picture.
Keep a simple tally as you go, one mark for each point the research-grade KPV listing answers with a document you can open.
1. Product Identity
Does the supplier clearly identify KPV? A pass shows the sequence Lys-Pro-Val and the CAS number.
2. Analytical Documentation
Can you open the actual test report? A pass is a downloadable file that names the method and the result for each test.
3. Lot Traceability
Can the vial be tied to a specific lot and COA? A pass prints the same lot number in both places.
4. Independent Testing
Who ran the test? A pass names an outside laboratory.
5. Testing Scope
Does the report stop at purity? A wider panel adds identity, content, endotoxin, and metals.
6. Product Specifications
Are molecular weight, sequence, CAS number, form, and quantity all listed, and do they agree with each other?
7. Storage Information
Does the page state how the sealed vial should be stored? All three suppliers here give a freezer temperature.
8. Research-Use Positioning
Does KPV present itself as research material throughout, with no human-use claims anywhere on the page?
9. Customer Support and Documentation Access
Can you get a missing document before you pay? A support email and stated hours count toward a pass.
10. Order Transparency
Are price, vial size, shipping terms, and stock status shown before checkout?
KPV Peptide Supplier Comparison
We compared three research suppliers that list KPV with a published certificate: Kylo Peptides, American Peptides, and Nationwide Peptides. We reviewed each supplier’s live KPV listing and current certificates, and noted what was missing and what was included.
1. Kylo Peptides
Kylo Peptides is our pick for buying KPV peptides when you want a test report that matches the exact vial size you order. We opened the certificates for both the 5 mg and 10 mg vials, and each one carries its own lot number and a ten-line test panel. The 5 mg vial (lot SD-260726-1) tested at 99.7% purity, and the 10 mg vial (lot SD-260729-1) at 99%.
- Availability and sizes: 5 mg at $44.95 and 10 mg at $59.95.
- Molecular information: sequence Lys-Pro-Val, formula C16H30N4O4, 342.43 g/mol, CAS 67727-97-3. The listing also notes an acetate counter-ion beside the free base values, so confirm the form on the lot report.
- Purity and identity: 99.7% on the 5 mg lot and 99% on the 10 mg lot by RP-HPLC, with identity by LC-MS.
- COA and lot traceability: lots SD-260726-1 and SD-260729-1, dated August 2026, and Kylo states that the lot ID is printed on the vial.
- Independent lab: both KPV reports come from Optiq Health Labs and carry a scan-to-verify code. Kylo’s wider COA library holds reports from four independent labs.
- Additional assays: net content, pH, water activity, endotoxin, sterility, yeast and mold, residual solvents, and heavy metals.
- Storage: sealed vials at -20 °C, away from light.
- Shipping and order terms: dispatch within 24 hours on business days, free US shipping over $150, and a 30-day money-back guarantee for a COA mismatch.
1. American Peptides
American Peptides puts the certificate and a 16-section safety data sheet on the same KPV page, a good fit for labs that file both with each reagent.
- Availability and sizes: 10 mg only, at $60.00, with volume pricing.
- Molecular information: CAS 67727-97-3; sequence: Lys-Pro-Val. The page prints two formula and weight pairs, so go by the certificate’s 342.4.
- Purity and identity: 99.73% by RP-HPLC, with identity by LC-MS/MS.
- COA and lot traceability: lot KPV10-0318, issued August 17, 2026. The certificate archive tags replaced certificates as superseded.
- Independent lab: Bioviridian, with a web verification code on the report.
- Additional assays: content, endotoxin, and heavy metals.
- Storage: -20 °C, protected from light and moisture.
- Shipping and order terms: same-day dispatch on orders before 12 pm CT, per the listing, and free shipping over $300.
See the American Peptides listing for the latest lot.
2. Nationwide Peptides
Nationwide Peptides links a Freedom Diagnostics report for each size, and each report carries a search code you can enter on the lab’s own site. The listing itself is light on chemistry.
- Availability and sizes: 5 mg at $50 and 10 mg at $65.
- Molecular information: the sequence appears in the description. The listing is missing the formula, weight, and CAS number.
- Purity and identity: 99.949% on the 5 mg report and 99.31% on the 10 mg report by HPLC-UV, with identity by LC-MS.
- COA and lot traceability: the 10 mg report shows lot V3312329779, dated July 2, 2026. The 5 mg report, from January 2026, shows no lot number.
- Independent lab: Freedom Diagnostics, as stated on its COA page.
- Additional assays: net content on the 10 mg report only, with no endotoxin or metals lines.
- Storage: -4 °F or colder for long-term holding.
- Shipping and order terms: free US shipping over $200, to domestic addresses only.
Ask Nationwide Peptides support about the 5 mg lot.
KPV Peptide Price: What Should You Compare?
KPV peptide price only matters when you compare it to the amount in the vial and the paperwork behind it. List prices across the three suppliers ran from $44.95 to $65.00 a vial. Per milligram, the 10 mg vials sit close together, between $6.00 and $6.50.
| Supplier | Size | List price | Per mg |
|---|---|---|---|
| Kylo Peptides | 5 mg / 10 mg | $44.95 / $59.95 | $8.99 / $6.00 |
| American Peptides | 10 mg | $60.00 | $6.00 |
| Nationwide Peptides | 5 mg / 10 mg | $50.00 / $65.00 | $10.00 / $6.50 |
Why the Cheapest KPV Listing May Not Be the Lowest-Cost Research Material
Price is the wrong first filter when deciding where to buy KPV peptide. A low sticker price can cost more once you factor in a failed assay or a repeat order. Weigh price beside the amount supplied, testing scope, COA access, independent testing, lot traceability, and shipping.
Compare Cost Per Documented Research Unit, Not Just Sticker Price
Divide the listed price by the milligrams in the vial, then note which documents and tests come with that lot. A vial with a lot-matched report from a named lab is a documented research unit. A bare vial is a guess with a price tag.
KPV Product Specifications Researchers Should Confirm Before Ordering
Research grade KPV has a short, fixed spec sheet, and you can tick every line off against the listing and the COA before you order. The formula and weight come from the PubChem record for the free base, and the CAS number is the one both Kylo and American Peptides print.
| Specification | What to Confirm |
|---|---|
| Compound | KPV / Lys-Pro-Val |
| Sequence | K-P-V |
| Molecular weight | Listed and internally consistent (342.43 g/mol, free base) |
| Formula | Clearly stated (C16H30N4O4, free base) |
| CAS | Clearly stated (67727-97-3) |
| Form | Clearly identified |
| Quantity | Clearly stated |
| Purity | Actual test result or specification |
| Identity | Analytical confirmation |
| COA | Available |
| Lot | Matches product |
| Storage | Clearly stated |
| RUO status | Clearly stated |
Two lines catch the most problems in practice: molecular weight and lot. A weight that disagrees with the formula points to a copy error or a different form. A lot that is missing from the report leaves the KPV purity figure with nothing to attach to.
Free Base vs. Salt/Form Information: Why Researchers Should Check the Listing
KPV free base and a salt such as KPV acetate are different material specifications, and a supplier may stock either. The FDA’s advisory committee agenda names both forms, “KPV (free base)” and “KPV acetate.” A listing that names the form saves you from comparing two vials that differ in ways the label hides.
Why the KPV Form Should Be Clearly Identified
A salt carries a counter-ion, which adds mass. So the formula and molecular weight of a salt form will differ from the free base figure of 342.43 g/mol. Two listings can both say “KPV 10 mg” and still describe different material.
What to Look for on the Product Page and COA
- Product form, stated in words
- Formula and molecular weight that fit that form
- Lot-specific documentation
- The same form, formula, and weight on the product page and the COA
Research Context: What Does KPV Literature Actually Show?
KPV research so far is limited to cell and animal models. Studies report effects on inflammatory signaling at very low concentrations, along with a specific route into cells. Human studies are still needed before anyone draws wider conclusions about what those findings mean.
KPV and Alpha-MSH
KPV is the last three amino acids of alpha-MSH. Getting’s 2003 mouse work found it behaved differently from the hormone’s central sequence and was unlikely to act through melanocortin receptors.
KPV and Inflammatory Signaling
Dalmasso and colleagues reported in 2008 that nanomolar KPV inhibited activation of the NF-κB and MAP kinase pathways in human intestinal cell lines.
KPV and PepT1
The same study showed that KPV enters cells through PepT1, a transporter for two- and three-amino-acid peptides. The full paper sets out the uptake experiments.
Cell Studies vs. Animal Studies
Cell studies show a mechanism in a dish. Animal studies, here two mouse colitis models, show an effect in a living system. In Dalmasso’s mouse work, KPV lowered pro-inflammatory cytokine expression in both models.
What the Existing Research Does Not Establish
These are preclinical findings, and they do not show how KPV behaves in people. They should not be presented as evidence of an approved human application.
How to Separate KPV Research Evidence From Marketing Claims
A KPV research finding and a supplier’s product description are different. The research findings report what a study saw in a specific model, and the description often stretches it into a promise. We sort them with the Five-Question Claim Check.
Research Finding vs. Supplier Description
- Research finding: “A study observed reduced NF-κB activation in intestinal cell lines.”
- Supplier description: “KPV does X.”
Five Questions to Ask About Any KPV Claim
- What experimental model was used?
- Was it cell, animal, or human research?
- What formulation was studied?
- What endpoint was measured?
- Has the finding been independently replicated?
Claims That Should Make a Research Buyer Pause
- Guaranteed biological outcomes
- Absolute mechanism claims
- Unsupported “clinical-grade” language
- Implied FDA approval
- Claims that a research product equals an approved drug
- A vague purity percentage with no document behind it
KPV Regulatory & Research-Use Status: What Buyers Should Know
KPV has no FDA approval as a drug, and buying it from a research supplier does not change that. In July 2026, an FDA advisory committee voted to add KPV to a compounding list. The vote is advisory, and the agency makes the final decision.
Is KPV FDA Approved?
No. No KPV drug has FDA approval, and a supplier listing KPV online is not evidence of one.
What Does Research-Use-Only Actually Mean?
A research reagent is sold for laboratory work and has not been reviewed as a medicine. An approved pharmaceutical is a specific finished product, cleared by the FDA for a stated use and made under drug manufacturing controls.
Why a Research-Use Label Does Not Replace Good Documentation
A supplier can print research-use language and still offer weak paperwork. Good paperwork, in turn, does not turn a research material into an approved drug.
2026 Regulatory Developments
On July 23, 2026, the FDA’s Pharmacy Compounding Advisory Committee discussed KPV free base and KPV acetate for the 503A Bulks List. The committee voted 8-6, with one abstention, to recommend inclusion. Adding a substance to that list requires FDA rulemaking, and the agency’s 503A bulks page did not list KPV when we checked.
Red Flags When Buying KPV Peptide Online
A weak KPV supplier usually gives itself away on the product page, well before a vial ships. Nine warning signs keep coming up when buying KPV online, and each one points to missing evidence. One flag is a reason to ask questions, and several together are a reason to move on.
No COA Available
With no certificate, there is nothing to check. Every other claim on the page rests on trust alone.
COA Has No Lot Number
A report with a blank or “N/A” lot field cannot be tied to your vial.
Product Page and COA Don’t Match
Different sizes, names, or weights between the page and the report mean one of them is wrong.
Purity Percentage Without a Testing Method
A purity figure needs a method beside it, such as RP-HPLC. A bare number is a slogan.
No Laboratory Identified
You can’t contact, search, or verify an unnamed lab.
Vague “Third-Party Tested” Claims
Ask which third party ran the test, on which date, and for which lot.
Inconsistent Molecular Information
Two different formulas or weights on one listing deserve a question before you order.
Research Product Marketed With Human-Use Claims
Research material sold with personal-use promises is a compliance and credibility issue.
Pressure-Based Pricing or Unsupported Quality Claims
Expiring-deal pressure and “highest quality” badges say nothing about the lot.
If the supplier cannot document what was tested, which lot was tested, who tested it, and what method was used, the buyer has limited evidence for evaluating the material.
Frequently Asked Questions About Buying KPV Peptide
Where can I buy KPV peptides for laboratory research?
Research suppliers that publish a lot-specific COA from a named lab are the place to start. Kylo Peptides, American Peptides, and Nationwide Peptides all list KPV online, and all three ship within the USA. Confirm the current lot before ordering.
Does KPV peptide come with a COA?
A reputable research supplier should provide one, ideally lot-specific. All three suppliers reviewed here post KPV certificates online. Save a copy on the day you order, since libraries get updated.
Should a KPV supplier provide third-party testing?
Yes, third-party testing strengthens the paperwork, because the result comes from a lab that does not sell the vial. Many labs let you confirm a report on their own site with a code. In-house testing alone requires you to take the seller’s word for it.
Does a higher purity percentage automatically mean better KPV?
No. Purity is one measurement. A vial with a near-perfect purity figure and no identity test, lot number, or content result tells you less than a slightly lower figure backed by a full panel from a named lab.
Is research-use KPV the same as an FDA-approved pharmaceutical?
No. Research-use KPV is a laboratory reagent tested to standards the supplier sets. No KPV product has FDA approval, so no approved prescription KPV medicine exists to compare it with.
How can I compare two KPV suppliers?
Run the 10-Point KPV Supplier Screen on both, using only what each live listing shows. Score each supplier out of ten. If the scores tie, compare the price per milligram for the vial size you plan to order.
Final Decision
Choosing a KPV research supplier comes down to five checks in order: identity, purity, testing, lot traceability, and documentation. A supplier that clears all five on its public pages has earned a place on your shortlist. Price is the tiebreaker after that.
- Kylo Peptides: a lot-numbered certificate for each size, with the widest test panel of the three.
- American Peptides: one 10 mg size, with the COA and safety data sheet on the listing.
- Nationwide Peptides: lab-searchable reports, with thinner detail on the listing.
Listings, lots, and prices change, so run the checks again on the day you order. If you are still weighing where to buy KPV peptide, start with the supplier whose paperwork you can verify without asking. Visit Kylo Peptides to read the current KPV certificate before you buy.
Disclaimers
- Affiliate disclosure: this page contains affiliate links, and Kylo Peptides is a commercial partner.
- Research use only: KPV from these suppliers is sold for laboratory research. It is not approved for human or veterinary use, and nothing here is medical advice.
- Accuracy: prices, stock, and documents were checked and may change.
