Swiss food giant Nestlé first detected the toxin cereulide in infant formula at a factory in the Netherlands at the end of November. + Get the most important news from Switzerland in your inbox But it took several weeks before the company could identify the original source. “At the end of November 2025, we detected very small quantities of cereulide in product samples as part of routine checks following the installation of new equipment on a production line at our factory in the Netherlands,” Nestlé outlined in a chronology of events. + Read about a management meltdown at Nestlé Production on the affected line was subsequently halted. On December 10, Nestlé informed the Dutch authorities as well as 16 potentially affected country markets and the European Commission. In the course of the further investigation, Nestlé realised that the contamination, which can cause vomiting and diarrhoea, did not originate from the production plant in the Netherlands, but from oil sourced from a …