The Substitute Has Its Own Toxicology · Europe's October 2026 Bisphenol Guidance, the Limits of BPA-Free Claims, and the Evidence Needed for Safer Food-Contact Innovation

The European Food Safety Authority's guidance published on 16 October 2026 changes the evidentiary expectations for bisphenols proposed as alternatives to bisphenol A in food-contact materials. Its central implication is easily missed: low migration, absence of harmonised hazard classification and a BPA-free label are three different propositions, none of which establishes the others. The guidance calls for immunological, developmental, reproductive, metabolic and toxicokinetic evidence even at migration below 0.05 mg/kg food, while the European Union's binding restrictions and transitional deadlines operate through a separate legal mechanism. This article examines the scientific basis for those requirements, the analytical distinction between residual monomers and non-intentionally added substances, and the engineering risks of changing coatings, membranes and packaging. It compares the EU and Spanish regime with Great Britain, Northern Ireland and the United States, and develops a testable research agenda for evaluating substitutions against chemical safety, food preservation and industrial performance simultaneously. Proposed innovation concepts are explicitly distinguished from established evidence and existing patented approaches.