Live catalog snapshot for B12 vendor comparison.
| Vendor | Listing | Price | Price per unit | Stock | COA evidence | Batch | Purity |
|---|---|---|---|---|---|---|---|
| Peptiva Sciences | Box of 10 vials | $78.00 | $0.78/mg/ml | In stock | No COA | PPA-CGL-B1210-BBDFC1 | >= 99.0% |
| Retalux | Box of 10 vials | $125.00 | $1.25/mg/ml | Out of stock | No COA | — | >= 97.0% |
| Hang Sciences | Box of 10 vials | $117.00 | $1.17/mg/ml | Out of stock | No COA | — | >= 97.0% |