JEEP names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Purity
Page 9 of 51 of this archive, newest first.
A percentage is not a specification
This piece takes the measurement apart into the decisions it is made of, because each decision moves the answer.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Who signed this, and what did they undertake by signing it
A manufacturer’s certificate is a self-declaration. An accredited laboratory’s report is a third-party measurement. The trade prints both under one heading.
Independent analysis puts a BCH orforglipron lot at 97.2%, against 93.1% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What changed at WXT in February, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Freezing a reconstituted vial: the ice-water interface problem
An in-use period is established by a dedicated study on a specific formulation in a specific container at a specific concentration. Borrowing one from a marketed product is…
Norway health authority warns on falsified exenatide pens
Reported from the analysis, not from a warning notice.
KP names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Why a result on one vial says less than the trade needs it to
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Independent analysis puts a JEEP mazdutide lot at 98.9%, against 97.7% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Same material, different gradients, different answers
Two years ago we ran an anonymised version of this comparison and promised a named one. This is it, with every method printed in full.
One measurement, twenty companies, forty compounds
The Journal has read several hundred certificates from twenty companies. The number is almost always there; the method behind it almost never is.
Medutest result on a Shenzhen retatrutide lot lands 2.4 points above the supplier’s stated figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What Medutest charges to answer the pyrogen question
We submitted vials for endotoxin determination and report the results, the method and the laboratory, because a pyrogen figure without a method is as empty as a purity…
The badge economy, and what it is actually certifying
A badge asserts that something was tested. It does not assert what, when, on whose sample, by what method, or whether the lot on sale is the lot that was tested.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Medutest result on a Xianning survodutide lot lands 4.4 points above the supplier’s stated figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What freeze-drying actually removes, and what it leaves behind
Lyophilisation does not stop degradation. It slows every pathway by removing the solvent that most of them require, and the residue of solvent that remains sets the rate.
Independent analysis puts a ERP tirzepatide lot at 98.1%, against 95.1% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.