In May 2026, the Codex Committee on Food Labelling will vote on a standardized threshold for precautionary allergen labelling (PAL) based on the ED05 eliciting dose — and the UK Food Standards Agency has already committed to supporting it. This shift will change how you assess allergen risk in your HACCP system and make your labelling defensible in law. If your current PAL decisions rely on vague "best judgment" rather than science-backed thresholds, this article explains what ED05 means and how to prepare.
What Is ED05 and Why Does It Matter?
ED05 is the eliciting dose predicted to trigger an allergic reaction in 5 percent of the allergic population. It is a statistically derived threshold based on real clinical dose-response data for each of the 14 major allergens. The FAO and WHO have published ED05 values for priority allergens, and these are now the basis for Codex's standardized approach to PAL.
Unlike the previous "may contain" labelling chaos — where manufacturers used inconsistent language and varying degrees of caution — an ED05-based standard provides a single, defensible reference point. A food allergen risk at or below ED05 is considered sufficiently safe that mild-to-moderate oral or skin symptoms only would occur in a small fraction of the allergic population.
For manufacturers, this is critical. It shifts PAL from an art into a science, with thresholds you can measure against and justify to auditors.
What's Happening at Codex and in the UK?
The Codex Committee on Food Labelling has recommended ED05-based threshold proposals. The UK FSA Board endorsed this position in December 2025 and committed to supporting formal adoption at the Codex Alimentarius Commission meeting in July 2026. The timeline is tight: by May 2026, the committee will vote on the specific ED05 values and labelling language for each allergen.
The FSA's position is clear: the agency will support standardized PAL controls, risk assessment methods, and labelling language across the UK food industry. This will likely translate into updated FSA guidance later in 2026.
Ireland, the EU, and Australia are already moving toward ED05-based systems. If you export to multiple markets, a Codex standard will simplify compliance dramatically — but only if your allergen controls meet the ED05 threshold.
Why This Matters to Your HACCP System
In HACCP, allergens are chemical hazards. Your hazard analysis must identify every allergen present in your product, every potential source of cross-contamination, and every control measure. The Codex decision tree (Steps 1–12) applies to allergen hazards just as it does to pathogens or foreign matter.
Under current UK guidance, you are required to apply a PAL only if there is an unavoidable risk of allergen cross-contamination that cannot be sufficiently controlled by segregation and cleaning. The question is: how do you define "unavoidable risk" and "sufficiently controlled"? ED05 answers that.
If your segregation and cleaning procedures are validated to keep allergen residue below the ED05 threshold for that allergen, you do not need a PAL. If you cannot achieve ED05, your control measure is PAL — the hazard remains managed, but via labelling rather than process control. Your HACCP system must document which allergens are controlled to ED05 (CCP or OPRP level) and which require labelling (labelling control, part of PRP).
This is not new thinking, but ED05 makes it measurable and auditable.
Practical Steps: How to Prepare Your HACCP Review
Start now. You have until mid-2026 before FSA updates are likely.
Step 1: Map Your Current Allergen Controls — Document which allergens are present in your product, which are intentional (declared) and which are environmental risks (segregation, cleaning, or PAL). For each environmental risk, identify the control: segregation (equipment, line, time separation), cleaning validation, or PAL.
Step 2: Validate Your Cleaning — For any segregation-based control, cleaning validation must prove that allergen residue on production equipment falls below an action level. Many manufacturers have never set a quantitative allergen action level. ED05 gives you a science-backed target. Swab data showing allergen protein levels, or LOD (limit of detection) below the ED05 threshold, is the proof point.
Step 3: Record Your Threshold Basis — Document the ED05 value you are using for each allergen (sourced from FAO/WHO published data), your action level for cleaning, your sampling method, and the frequency of monitoring. This audit trail is what an inspector or auditor will expect to see.
Step 4: Review Your PAL Labelling — Current FSA guidance requires you to declare the specific allergen (e.g., "may contain peanuts") not generic terms like "may contain nuts." With ED05 standardization, you should be able to justify each PAL statement with a documented risk assessment showing why that allergen cannot be controlled below ED05.
Strengthening Your Allergen HACCP System
A structured HACCP system is your defense. SafetyCore's hazard analysis module forces you to assess every allergen hazard systematically — source, control measures, CCP vs. OPRP vs. PRP determination — and you cannot proceed without documenting the basis for each decision. Your audit trail shows every revision, approval, and review timestamped and locked, which is exactly what an auditor expects to see when they ask: "Why did you choose a PAL for this allergen instead of controlling it to ED05?"
When ED05 thresholds are formally adopted at Codex in July 2026, your HACCP plan should already reference them by allergen and document your control strategy against those thresholds. SafetyCore's triggered review feature means you can initiate a structured allergen review when the Codex standard is published and formally adopt it into your system within a documented change control cycle.
What to Do This Week
Review your current allergen PAL statements. For each one, ask: "Could I defend this PAL to a BRC auditor or the FSA using an ED05 threshold?" If the answer is no — if your decision was based on caution rather than data — schedule a review of your allergen control procedures. Identify which allergen cross-contamination risks are process-controlled (segregation, cleaning) and which require labelling. For the process-controlled ones, plan cleaning validation studies to establish your ED05-based action level.
The Codex standard is coming. Get ahead of it now, not in emergency mode in July 2026.