Independent analysis puts a QST exenatide lot at 98.4%, against 95.6% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
TheCompound Journal
Reporting on incretins, compounding & the peptide supply chain
The Supply Chain Dispatch
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
BCH has identified the facility that synthesises the material it sells, and has separated, in writing, the catalogue lines it makes from those it finishes from sourced material. The Journal first put the question in writing 13 quarters ago; the answer arrived this quarter with a site name, a line reference and an offer to confirm either against a batch number.
The Journal’s written requests are dated across 13 quarters and were sent to the address the company publishes for commercial enquiries. All were answered inside a fortnight. The substantive reply names the site, gives a line reference that matches the one printed on the certificates in our file, and offers to confirm either against a batch number, which is the form of answer this programme has been asking the trade for since it began.
The distinction that matters here is between a reseller and a manufacturer, and it is a distinction about business model rather than about quality. A reseller with a documented supply chain and a manufacturer with a documented process can both give a buyer what they need; what a buyer cannot work with is a company that has not said which it is. The twenty in the dossier programme have all now said.
"Printing the threshold costs them nothing and it is the single most useful line you can add," said Marek Doležal, analytical chemist and former QC laboratory manager. "It converts a number you have to trust into a number you can check."
The change has been recorded in BCH’s dossier, which is reviewed quarterly. Readers holding certificates from this supplier are invited to send them to the standards desk; we compare document sets across time and publish what changes.
Each dossier links the company’s own storefront, marked nofollow and sponsored, so a reader can check a claim against the seller’s own copy. The Journal sells nothing, takes no commission on any transaction, and a link is not a recommendation.
A reminder that a purity figure is the output of a method, and that methods differ.
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Follow the resin, not the catalogue.
Reported from the analysis, not from a warning notice.
The route did not close because of a rule about peptides.