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Best Peptides

Best KPV Vendors by COA Purity

Find the best KPV vendors ranked by third-party COA purity, content accuracy, and testing breadth. Compare 5 vendors side by side.

All Compounds

Best Score

Ion Peptides
75.0
1
Ion Peptides75.0
Purity: 99.86%Label: 50 MGMeasured: 53.27mgFreedom DiagnosticsHPLC, Identity, EndotoxinLot: 06242025
2
Amino Club48.0
Purity: 99.36%Measured: 10.58mgILS Laboratories7 tests: HPLC Purity, Net Peptide Content, Endotoxin, Sterility, Heavy Metals, Fentanyl Screen, AppearanceJul 2026Lot: KPV0002
3
Southern Aminos36.0
Purity: 99.74%Measured: 15.54mgFreedom DiagnosticsHPLC, Identity, EndotoxinJan 2026Lot: KP101225A
4
Glow Aminos36.0
Purity: 99.79%Measured: 10.67mgILS LaboratoriesFull QC Panel (HPLC, Identity, Endotoxin, Sterility, Heavy Metals)Aug 2026Lot: GL-010249
5
Iron Protocol36.0
Purity: 99.79%Measured: 10.67mgILS LaboratoriesFull QC Panel (HPLC, Identity, Endotoxin, Sterility, Heavy Metals)Aug 2026Lot: IP-010249

Scoring methodology: Each COA is scored on a 100-point scale across three categories:

Purity (45 pts): Nine tiers from 99.95%+ (full marks) down to below 98% (10 pts). Small differences in purity matter — a 99.9% score earns more than 99.5%.

Content accuracy (35 pts): Compares the labeled strength to what was actually measured. Vials within 0-5% overfill receive full marks. Underfilled vials are penalized at twice the rate of overfilled ones, because getting less than you paid for is worse than getting a little extra.

Testing breadth (20 pts): More tests mean more transparency. COAs with 7+ tests (HPLC, LC-MS, endotoxin, sterility, heavy metals, etc.) earn full marks. A single test earns just 5 points.

This comparison evaluates lab documentation quality and transparency. It is not a safety or efficacy rating.

Research & Informational Use Only. PeptideScores does not sell, endorse, or facilitate the purchase of any compound for human use. All compounds referenced are intended for laboratory research purposes only. We review vendors; we do not provide dosing guidance, medical advice, or treatment recommendations.

Research & Informational Use Only. PeptideScores does not sell, endorse, or facilitate the purchase of any compound for human use. All compounds referenced are intended for laboratory research purposes only. We review vendors; we do not provide dosing guidance, medical advice, or treatment recommendations.