Live catalog snapshot for P21 vendor comparison.
| Vendor | Listing | Price | Price per unit | Stock | COA evidence | Batch | Purity |
|---|---|---|---|---|---|---|---|
| Wubei Chemicals | Box of 10 vials | $418.60 | $8.37/mg | In stock | No COA | — | >= 99.0% |
| Lumira | Box of 10 vials | $500.50 | $10.01/mg | Out of stock | No COA | Yes | >= 99.0% |
| CorePeptide | Box of 10 vials | $399.10 | $7.98/mg | Out of stock | No COA | — | >= 99.0% |
| HelixBridge | Box of 10 vials | $456.25 | $9.13/mg | Out of stock | No COA | — | >= 99.0% |