What changed at QSC in January, and what the company will not say about it

QSC has again declined to identify the facility that synthesises the material it sells. The Journal has now put the question in writing on 8 occasions since 2026, in each case asking only for the name of the synthesis house or an acknowledgement that the company is a reseller. The replies have been courteous and have addressed a different question.

The Journal’s written requests are dated across 8 quarters and were sent to the address the company publishes for commercial enquiries. Four received a reply within a fortnight. Each reply restated the company’s quality claims and none named a facility. One offered a video call, which the Journal declined on the grounds that a video call produces nothing publishable.

The distinction that matters here is between a company that will not answer and a company that cannot. A reseller with no visibility into its own supply chain is in a different position from a manufacturer protecting a process, and the two are indistinguishable from the outside — which is precisely why the Journal reports the count of unanswered requests rather than an inference about the reason.

"Printing the threshold costs them nothing and it is the single most useful line you can add," said Dr Éliane Casgrain, health economist, Université de Montréal. "It converts a number you have to trust into a number you can check."

The Journal has asked QSC whether the practice will be applied to all lots or only to some, and whether earlier certificates will be reissued. The dossier records the reply.