Best sources ranked · 2026

Best KPV Sources

52 US vendors carry KPV. Ordered below by the lab-rule score of each vendor’s certificate for KPV, then by the vendor’s published score; prices are per milligram. Tripeptide (lysine-proline-valine) matching the C-terminal end of alpha-MSH. Sold for laboratory research use only.

Reviewed by the Peptide Source Review teamLast audited How we rate

Vendors
52

Vendors

With COAs
38

With COAs

Best $/mg
$0.77

Best $/mg

Looking for the top picks? Best KPV vendors, ranked by PSR score →

New to KPV? What is KPV? Our plain-English, research-use-only guide: what it is and how to spot a verified source.

Every KPV source, by certificate

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. How the lab rule scores a certificate. For the market-wide picture, see our 2026 study of peptide vendor testing.

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

1S1Research
9.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.89certificate

Vendor score 7.70/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.00
Best price
$30.00 / 10mg
Shop S1Research → (opens in new tab)
2Limitless Biotech
9.5/103 base, +2 MZ Biolabs tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, +0.5 purity 99.71certificate

Vendor score 6.97/10Fair

Verified (opens in new tab)MZ BiolabsTier A
Price per mg
$9.60
Best price
$95.99 / 10mg
Shop Limitless Biotech → (opens in new tab)
3Southern Aminos
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.722certificate

Vendor score 8.09/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$4.00
Best price
$40.00 / 10mg
Shop Southern Aminos → (opens in new tab)
4Amino Club
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.36certificate

Vendor score 8.08/10Strong

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$4.00
Best price
$39.99 / 10mg
Shop Amino Club → (opens in new tab)
5Modern Aminos
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.11certificate

Vendor score 7.88/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$3.90
Best price
$39.00 / 10mg
Shop Modern Aminos → (opens in new tab)
6Bluum Peptides
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.76certificate

Vendor score 7.48/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$5.50
Best price
$55.00 / 10mg
Shop Bluum Peptides → (opens in new tab)
7Direct Peptides
9.0/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.75certificate

Vendor score 7.43/10Strong

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$7.90
Best price
$79.00 / 10mg
Shop Direct Peptides → (opens in new tab)
8BioLongevity Labs
9.0/103 base, +2 MDx BioAnalytical Laboratory tier A+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0 accreditation (tested 2026-06-05, before 2026-06-09), +0.5 purity 99.71certificate

Vendor score 7.24/10Strong

Verified (opens in new tab)MDx BioAnalytical LaboratoryTier A+
Price per mg
$10.00
Best price
$99.97 / 10mg
Shop BioLongevity Labs → (opens in new tab)
9VERATIS
9.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.67certificate

Vendor score 7.21/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$6.00
Best price
$60.00 / 10mg
Shop VERATIS → (opens in new tab)
10Paramount Peptides
9.0/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.35certificate

Vendor score 7.12/10Strong

Verified (opens in new tab)Accumark LabsTier B+
Price per mg
$6.29
Best price
$62.90 / 10mg
Shop Paramount Peptides → (opens in new tab)
Show 42 more carriers
11Hello Stacks
9.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 purity 99.8certificate

Vendor score 6.08/10Fair

Verified (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop Hello Stacks → (opens in new tab)
12Vortex Research
9.0/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, +0.5 sterility, 0 purity 99.44certificate

Vendor score 5.61/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop Vortex Research → (opens in new tab)
13DAAVY Research
8.5/103 base, +2 Bioviridian tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.83certificate

Vendor score 8.01/10Strong

Verified (opens in new tab)BioviridianTier A-
Price per mg
$4.40
Best price
$44.00 / 10mg
Shop DAAVY Research → (opens in new tab)
14Pacific Edge Labs
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.74certificate

Vendor score 7.15/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$8.00
Best price
$79.95 / 10mg
Shop Pacific Edge Labs → (opens in new tab)
15Rogue Compounds
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.73certificate

Vendor score 6.86/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$6.50
Best price
$64.99 / 10mg
Shop Rogue Compounds → (opens in new tab)
16Modified Aminos
8.5/103 base, +2 Ethos Analytics Laboratory tier B+, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, no purity figurecertificate

Vendor score 6.75/10Fair

Verified (opens in new tab)Ethos Analytics LaboratoryTier B+
Price per mg
$3.80
Best price
$37.99 / 10mg
Shop Modified Aminos → (opens in new tab)
17BulkGLP
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.18certificate

Vendor score 6.71/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$7.00
Best price
$70.00 / 10mg
Shop BulkGLP → (opens in new tab)
18Peptyes
8.5/103 base, +2 Horizon Analytical tier A-, +1.5 key, +1.5 key confirmed, +0.5 endotoxin, 0 purity 99.45certificate

Vendor score 6.55/10Fair

Verified (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$6.00
Best price
$60.00 / 10mg
Shop Peptyes → (opens in new tab)
19JD BioWorks
8.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.81certificate

Vendor score 6.34/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$6.50
Best price
$64.95 / 10mg
Shop JD BioWorks → (opens in new tab)
20OMNI Peptides
8.5/103 base, +2 Accumark Labs tier B+, +1.5 key, +1.5 key confirmed, +0.5 purity 99.763certificate

Vendor score 6.17/10Fair

Verified (opens in new tab)Accumark LabsTier B+
Price per mg
$7.00
Best price
$69.99 / 10mg
Shop OMNI Peptides → (opens in new tab)
21AminoWave Labs
8.5/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, +0.5 purity 99.83certificate

Vendor score 5.85/10Fair

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$5.00
Best price
$50.00 / 10mg
Shop AminoWave Labs → (opens in new tab)
22Redline Bio Labs
8.5/103 base, +2 AV Analytics tier A-, +1.5 key, +1.5 key confirmed, +0.5 purity 99.81certificate

Vendor score 4.80/10Weak

Verified (opens in new tab)AV AnalyticsTier A-
Price per mg
$5.50
Best price
$55.00 / 10mg
Shop Redline Bio Labs → (opens in new tab)
23Luv Aminos
8.0/103 base, +2 Freedom Diagnostics Testing tier A, +1.5 key, +1.5 key confirmed, 0 purity 99.61certificate

Vendor score 7.90/10Strong

Verified (opens in new tab)Freedom Diagnostics TestingTier A
Price per mg
$4.00
Best price
$20.00 / 5mg
Shop Luv Aminos → (opens in new tab)
24LabFirst Peptides
8.0/103 base, +2 Kovera Labs tier A-, +1.5 key, +1.5 key confirmed, 0 purity 99.619certificate

Vendor score 7.73/10Strong

Verified (opens in new tab)Kovera LabsTier A-
Price per mg
$4.90
Best price
$49.00 / 10mg
Shop LabFirst Peptides → (opens in new tab)
25StudzPeptides
8.0/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.21certificate

Vendor score 7.10/10Strong

Verified (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$2.70
Best price
$27.00 / 10mg
Shop StudzPeptides → (opens in new tab)
26NuuVive Peptides
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.6certificate

Vendor score 6.93/10Fair

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$7.73
Best price
$232.00 / 30mg
Shop NuuVive Peptides → (opens in new tab)
27NextGen Peps
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.007certificate

Vendor score 5.95/10Fair

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$4.20
Best price
$42.00 / 10mg
Shop NextGen Peps → (opens in new tab)
28Swiss Chems
8.0/103 base, +2 Janoshik Analytical tier B+, +1.5 key, +1.5 key confirmed, 0 purity 99.387certificate

Vendor score 5.39/10Weak

Verified (opens in new tab)Janoshik AnalyticalTier B+
Price per mg
$9.33
Best price
$139.95 / 15mg
Shop Swiss Chems → (opens in new tab)
29Ageless Peptides
7.5/103 base, +2 Vanguard Laboratory tier B+, +1.5 key, +0.5 endotoxin, +0.5 purity 99.8certificate

Vendor score 4.36/10Weak

View (opens in new tab)Vanguard LaboratoryTier B+
Price per mg
$5.00
Best price
$49.99 / 10mg
Shop Ageless Peptides → (opens in new tab)
30Prime Peptide Solutions
7.0/103 base, +2 BT Labs tier B, +1.5 key, +0.5 purity 99.7certificate

Vendor score 7.14/10Strong

View (opens in new tab)BT LabsTier B
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop Prime Peptide Solutions → (opens in new tab)
31Curo
6.5/103 base, +2 BT Labs tier B, +1.5 key, 0 purity 99.6certificate

Vendor score 6.27/10Fair

View (opens in new tab)BT LabsTier B
Price per mg
$7.40
Best price
$74.00 / 10mg
Shop Curo → (opens in new tab)
32NextSelf Labs
6.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 98.41certificate

Vendor score 6.26/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$4.00
Best price
$119.99 / 30mg
Shop NextSelf Labs → (opens in new tab)
33GhostLabz
6.5/103 base, +2 ILS Laboratories tier B+, +1.5 key, +1.5 key confirmed, -1.5 purity 98.41certificate

Vendor score 6.14/10Fair

Verified (opens in new tab)ILS LaboratoriesTier B+
Price per mg
$4.50
Best price
$44.99 / 10mg
Shop GhostLabz → (opens in new tab)
34AminoVault
5.5/103 base, +2 MDx BioAnalytical Laboratory tier A+, +0 accreditation (tested 2025-10-15, before 2026-06-09), +0.5 purity 99.8certificate

Vendor score 5.78/10Fair

Verified (opens in new tab)MDx BioAnalytical LaboratoryTier A+
Price per mg
$6.88
Best price
$68.85 / 10mg
Shop AminoVault → (opens in new tab)
35Based Research
5.0/103 base, +0 Analytical Formulations tier C, +1.5 key, +0.5 purity 99.7certificate

Vendor score 4.54/10Weak

View (opens in new tab)Analytical FormulationsTier C
Price per mg
$12.00
Best price
$120.00 / 10mg
Shop Based Research → (opens in new tab)
36VoriLabs
3.5/103 base, +2 Krause Analytical LLC tier B-, -1.5 purity 98.2certificate

Vendor score 6.87/10Fair

View (opens in new tab)Krause Analytical LLCTier B-
Price per mg
$5.00
Best price
$49.99 / 10mg
Shop VoriLabs → (opens in new tab)
37Lotus Peptide
2.0/10Amino Metrics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.74/10Poor

Vendor report (lab not established) (opens in new tab)Amino MetricsTier D
Price per mg
$3.00
Best price
$30.00 / 10mg
Shop Lotus Peptide → (opens in new tab)
38Pexo Labs
2.0/10Amino Metrics tier D: independence not established = 2.0 flatcertificate

Vendor score 3.63/10Poor

Vendor report (lab not established) (opens in new tab)Amino MetricsTier D
Price per mg
$3.80
Best price
$37.99 / 10mg
Shop Pexo Labs → (opens in new tab)
39RapidCore Bio
2.0/10self-issued by the vendor = 2.0 flatcertificate

Vendor score 3.26/10Poor

Vendor-issued (opens in new tab)
Price per mg
$5.00
Best price
$50.00 / 10mg
Shop RapidCore Bio → (opens in new tab)
40Arctic Lab Supply
0.0/10no certificatecertificate

Vendor score 7.09/10Strong

NoneNo third-party COA was publicly available at audit time
Price per mg
—
Best price
—
Shop Arctic Lab Supply → (opens in new tab)
41NovaForge Labs
0.0/10no certificatecertificate

Vendor score 6.89/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.00
Best price
$40.00 / 10mg
Shop NovaForge Labs → (opens in new tab)
42FRO Peptides
0.0/10no certificatecertificate

Vendor score 6.67/10Fair

NoneNo third-party COA was publicly available at audit time
Price per mg
$5.50
Best price
$54.99 / 10mg
Shop FRO Peptides → (opens in new tab)
43Peptide Pro
0.0/10posted copy differs from the lab's copy = 0certificate

Vendor score 5.62/10Fair

View COA (differs from lab copy) (opens in new tab)Horizon AnalyticalTier A-
Price per mg
$5.95
Best price
$59.49 / 10mg
Shop Peptide Pro → (opens in new tab)
44Drexa Labs
0.0/10no certificatecertificate

Vendor score 3.28/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$3.90
Best price
$39.00 / 10mg
Shop Drexa Labs → (opens in new tab)
45Snowman Research
0.0/10no certificatecertificate

Vendor score 3.06/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.00
Best price
$40.00 / 10mg
Shop Snowman Research → (opens in new tab)
46YourFitnessPeptides
0.0/10no certificatecertificate

Vendor score 2.75/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$3.89
Best price
$38.89 / 10mg
Shop YourFitnessPeptides → (opens in new tab)
47Anhydrolabs
0.0/10no certificatecertificate

Vendor score 2.66/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.00
Best price
$39.95 / 10mg
Shop Anhydrolabs → (opens in new tab)
48Peptide Warehouse US
0.0/10no certificatecertificate

Vendor score 2.46/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$4.40
Best price
$440.00 / 10 x 10mg pack
Shop Peptide Warehouse US → (opens in new tab)
49Peptara Labs
0.0/10no certificatecertificate

Vendor score 2.38/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$9.50
Best price
$95.00 / 10mg
Shop Peptara Labs → (opens in new tab)
50PepBiotics
0.0/10no certificatecertificate

Vendor score 2.23/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$11.25
Best price
$56.24 / 5mg
Shop PepBiotics → (opens in new tab)
51Welon Peptide Solutions
0.0/10no certificatecertificate

Vendor score 2.13/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$0.77
Best price
$77.00 / 10 x 10mg pack
Shop Welon Peptide Solutions → (opens in new tab)
52Medura Peptides
0.0/10no certificatecertificate

Vendor score 1.63/10Poor

NoneNo third-party COA was publicly available at audit time
Price per mg
$6.30
Best price
$62.99 / 10mg
Shop Medura Peptides → (opens in new tab)

“Shop” links may be affiliate links (rel="sponsored"); we may earn a commission. Affiliate status never affects any rating, rank, or gate. Disclosure.

Affiliate partners carrying KPV

Affiliate links: we may earn a commission if you buy. It never changes a score or rank.

Highest-placed partner

Limitless Biotech9.5/10 certificate

The highest-placed affiliate partner in the table above for KPV: certificate 9.5/10, vendor score 6.97/10.

Shop Limitless Biotech → (opens in new tab)
Limitless Biotech discount code →

Largest partner reader code

Hello Stacks25% off

The largest reader discount among our affiliate partners carrying KPV: 25% off with code PSR25.

Shop Hello Stacks → (opens in new tab)
Hello Stacks discount code →

KPV: Frequently Asked Questions

Who has the best KPV?

In our 2026 audit, S1Research is listed first for KPV: its certificate for KPV scores 9.5/10 on our lab rule, and its published vendor score is 7.70/10. The full ordered table is on this page.

What is the cheapest KPV per mg?

The lowest recorded price per milligram for KPV in our audit is the "Best $/mg" figure at the top of this page, and every carrier's price per mg is in the table. Cheapest is not the same as best: the table is ordered by certificate and vendor score, not by price.

How do you rate KPV vendors?

Ordered by the lab-rule score of each vendor's certificate for this product (out of 10), then by the vendor's published score, then alphabetically. The certificate score is the same lab rule that builds each vendor's lab sub-score, applied to that vendor's certificate for KPV; the vendor score is the published overall score. Price per mg is shown but does not change the order. See our methodology for the lab rule.

Also available at these peptide pages

BPC-157MOTS-cNAD+GHK-Cu

Related peptides

Melanotan-2 · Melanocortin peptidePT-141 · Melanocortin peptideMelanotan-1 · Melanocortin peptideBPC-157 · Synthetic peptide fragment

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