Live catalog snapshot for B12 vendor comparison.
| Vendor | Listing | Price | Price per unit | Stock | COA evidence | Batch | Purity |
|---|---|---|---|---|---|---|---|
| Peptiva Sciences | Box of 10 vials | $84.00 | $0.84/mg/ml | In stock | No COA | PPA-CGL-B1210-BBDFC1 | >= 99.0% |
| Retalux | Box of 10 vials | $120.00 | $1.20/mg/ml | Out of stock | No COA | — | >= 98.0% |
| Hang Sciences | Box of 10 vials | $144.00 | $1.44/mg/ml | Out of stock | No COA | — | >= 98.0% |