Batch Announcements · Jul 12, 2026
How a Lot Moves From Receiving to Release
Suppliers describe their testing in the vaguest terms available, usually some variation of "all products are third-party tested". It is worth being specific instead, because the difference between *tested* and *tested with the report published for the exact lot in your hand* is the whole point.
What happens when a lot arrives
Every lot is recorded against its own batch number on arrival — the same number printed on the vial label and the same one shown on the product page. Nothing is pooled. Two vials of the same compound from different lots stay separate in inventory for their whole life, which is what makes a per-lot certificate mean anything at all.
Stock is held at the storage condition listed for that compound and is not repackaged or relabelled.
Which lots carry a certificate
This is the part usually left unsaid, so plainly: not every lot has been analysed. At the time of writing, four lots carry a published third-party purity figure:
| Compound | Lot | Purity | Laboratory |
|---|---|---|---|
| Retatrutide | KP-RETA-2602 | 99.90% | Krause Analytical |
| BPC-157 | KP-BPC-2612 | 99.60% | BT Labs |
| GHK-Cu | KP-GHK-2609 | 99.90% | Krause Analytical |
| Melanotan II | KP-MELA-2608 | 99.82% | Krause Analytical |
Everything else in the catalogue is currently listed without one. Those product pages say so, and the lab results page shows the certificate status per lot rather than a site-wide badge.
We would rather tell you that than imply a coverage level we do not have. A supplier claiming a certificate for every lot is either much larger than us or is not being straight with you — testing is charged per lot, per compound, and it is not cheap.
What a published certificate contains
Where a lot has been analysed, the certificate names the laboratory, the method, the date and the measured purity for that specific lot — not a typical value, not a figure inherited from a previous batch. See how to read a certificate of analysis for what each section means, and how to spot a forged one for the checks worth running on any supplier's paperwork, ours included.
Checking before you order
Every lot's status is on the lab results page. If a compound matters to you specifically because it has been analysed, check there first — stock rotates, and an untested lot of the same compound can replace a tested one.
All products are supplied as laboratory reagents for research use only.
Related reading
- Retatrutide Starter Kit (Canada): What's Included
What the Kits Peptides retatrutide starter kit includes, how it compares to buying vials separately, and how it ships from Vancouver.
- How to Choose a Research Peptide Supplier in Canada
A clear set of checks for evaluating Canadian research-peptide suppliers: domestic fulfillment, per-lot COAs, HPLC and mass spec, and a real research-use-only posture.
- Why a 5 mg Vial Costs More Than Another 5 mg Vial
Two vials, same mass, ten times the price. The answer is chain length, and it is visible in the molecular formula before you ask anyone.
- What a CAS Number Actually Tells You (and What It Does Not)
A CAS number identifies a substance unambiguously. It says nothing about purity, quality, or whether the vial in front of you contains what the label claims.