IN Brief:
- Codex has adopted international guidance on risk based precautionary allergen labelling.
- The guidance uses threshold levels and reference doses for priority allergens, including gluten.
- Manufacturers may face stronger pressure to justify when “may contain” statements are used.
Codex Alimentarius Commission has adopted international guidance for risk based precautionary allergen labelling, creating a more harmonised framework for “may contain” statements on pre-packed foods.
The guidance has been adopted as an annex to the General Standard for the Labelling of Pre-Packaged Foods. It recommends a systematic approach based on risk assessment, threshold levels, and reference doses for priority food allergens, including gluten.
The objective is to reduce inconsistent allergen warning statements and improve clarity for consumers, regulators, and manufacturers. Precautionary allergen labelling has often been used defensively where unintended allergen presence cannot be ruled out, but excessive or inconsistent warnings can make risk difficult to interpret and may limit product choice for allergic consumers.
The Codex approach directs warning statements towards situations where the risk of unintended allergen presence has been scientifically assessed and cannot be adequately controlled through good allergen management practice. That places more emphasis on manufacturing evidence than on label wording alone.
The change sits at the intersection of ingredients, cleaning validation, scheduling, supplier approval, changeover control, environmental contamination, and packaging artwork. A “may contain” statement should reflect a managed residual risk rather than a substitute for process control. As countries begin reviewing how to adopt or align with the Codex framework, allergen decisions will need stronger technical logic behind them.
Label accuracy is already under scrutiny, with recent UK food sample surveillance identifying compliance gaps across labelling, authenticity, and ingredient controls. The Codex allergen guidance reinforces the same direction: the evidence behind the label is becoming as important as the words printed on it.
Allergen risk is difficult because it is often driven by low-level cross contact rather than deliberate formulation. Shared lines, shared storage, rework, dust, utensils, packaging mix-ups, supplier variation, and cleaning failures can all create unintended presence. The manufacturer must decide whether controls reduce the risk adequately or whether precautionary labelling remains necessary.
Risk based labelling will increase the value of validated allergen management systems. Factories will need clear allergen maps, supplier declarations, segregated storage, documented cleaning procedures, line clearance checks, test results where appropriate, and robust artwork control. Product reformulation and supplier changes will also need stronger allergen review before launch.
Innovation adds further complexity. Protein-enriched foods, plant based products, bakery lines, snacks, sauces, ready meals, and functional nutrition products often handle ingredients such as milk, egg, soy, nuts, peanuts, sesame, wheat, fish, crustaceans, and lupin. As ingredient complexity increases, the burden of managing cross contact and label accuracy increases with it.
Overuse of precautionary statements can weaken trust. If every product carries broad “may contain” wording, allergic consumers may struggle to distinguish higher-risk products from those where the warning is mainly defensive. A more harmonised system should help narrow warnings to situations where risk remains after reasonable controls have been applied.
International standards often shape expectations before national law changes. Retailers, auditors, and regulators may use the Codex framework to assess whether allergen warnings are justified, especially where products are sold across multiple markets. Technical teams should review allergen risk assessment procedures, label approval processes, and cleaning validation records before those expectations harden.
The adoption of risk based guidance marks a shift from precautionary labelling as a broad safety net towards precautionary labelling as a justified control outcome. The label will still be visible on the pack, but the decisive work will sit inside the factory, the supplier file, and the evidence that supports the final wording.
