Allergen management is the control programme most often described as being in place and least often demonstrated with evidence. Almost every supplier questionnaire returns “yes” to segregation, cleaning and labelling review. Far fewer sites can produce a validated cleaning procedure, a swab result against a defined acceptance criterion, or a documented rationale for the precautionary statement they print. The gap between the two is where recalls come from.
This guide is written for a site that handles several allergenic streams at once, which is the normal condition in the nuts, seeds and plant protein category: tree nuts and peanuts on the same sorting and packing equipment, soy and sesame in the same intake bay, gluten-bearing cereals in the neighbouring mill.
What the law actually requires
In the Union, allergen labelling is set by Regulation (EU) No 1169/2011 on the provision of food information to consumers. Annex II to that regulation lists the fourteen substances or products causing allergies or intolerances that must be declared whenever they are used as an ingredient or processing aid, with the name emphasised in the ingredient list so it stands out from the surrounding text.
Several points in Annex II matter specifically to this category and are routinely misread.
The tree nut list is closed and specific. It names almonds, hazelnuts, walnuts, cashews, pecans, Brazil nuts, pistachios and macadamia or Queensland nuts. A nut that is not on the list is not a listed allergen in the Union, whatever it is called commercially.
Coconut is not a listed allergen in the EU. It is a drupe, not a tree nut in the botanical sense, and it does not appear in Annex II. Regulatory treatment differs elsewhere, and in the United States coconut has historically been handled as a tree nut for labelling purposes. A site exporting to several markets cannot apply one rule.
Peas are not a listed allergen; soybeans are. This is the single most commercially significant difference between pea protein and soy protein in the Union, and it is why pea protein appears in reformulation projects driven by label simplification.
Sesame is listed and it behaves badly in a mixed facility because the seed is small, it travels and it is a potent allergen at low doses.
Exemptions are narrow and specific. Annex II exempts, for example, fully refined soybean oil and fat and certain soy-derived tocopherols. It does not exempt soy lecithin. A specification that assumes lecithin is exempt is wrong.
Cereals containing gluten are listed by name, and separately from that, the gluten-free claim is regulated by Commission Implementing Regulation (EU) No 828/2014, which sets the threshold for the claim and the conditions for the “very low gluten” statement. Absence of a gluten-containing ingredient is not the same as eligibility for the claim; the claim requires the analytical threshold to be met in the food as sold.
Finally, and importantly, precautionary allergen labelling is not regulated in the Union. “May contain traces of nuts” has no legal definition, no threshold behind it and no required basis. It is voluntary, and Article 36 of Regulation (EU) No 1169/2011 requires only that voluntary information not be misleading or ambiguous. A statement applied by default, without a risk assessment, is exactly the ambiguity that provision is aimed at.
The control hierarchy on a mixed site
Allergen control follows the same hierarchy as any other hazard: eliminate, then separate, then schedule, then clean, then verify, then label. Labelling is last because it is the weakest control, not the first because it is the cheapest.
Elimination. Removing an allergen from a site is the only complete control. Where a product range allows it, dedicating a site or a building to a non-allergen stream removes the problem rather than managing it. This is why a nut-free claim from a dedicated site is worth a premium and a nut-free claim from a mixed site is worth an argument.
Physical segregation. Separate intake bays, separate storage areas with allergens stored below non-allergens to prevent spillage transfer, separate transfer equipment, colour-coded scoops and utensils, and dedicated dust extraction. Airborne transfer is the one route most often missed. Nut and seed handling generates fine dust that travels on air currents and on operators, and a segregation plan that stops at the equipment boundary does not address it.
Production scheduling. Running from the lowest allergen load to the highest across a shift, with the full clean at the end rather than between every changeover, is standard practice and legitimate provided the sequence is documented and followed. It fails when a schedule change happens on the floor without the allergen sequence being re-checked.
Cleaning, and its validation. This is the control that separates a real programme from a paper one. Dry processing lines for nuts, seeds and powders usually cannot be wet cleaned, because introducing water into a dry line creates a microbiological hazard that is worse than the one being solved. The alternatives are dry cleaning by vacuum and brush, controlled air, dismantling, and flushing with a bulk material that is then diverted.
A flush needs three defined elements: the flush material, the flush quantity, and the disposition of the flushed material. A site that flushes with the next product and sends it all forward has not cleaned; it has diluted.
Verification. Visual inspection confirms that a clean was performed. It does not confirm that the clean is effective. Effectiveness is established once, by validation, and confirmed routinely thereafter. Validation means running the worst-case changeover, applying the cleaning procedure and testing the result against an acceptance criterion derived from a risk assessment. Routine verification then uses the faster checks: visual, protein swabs, and periodic allergen-specific ELISA on rinse or flush samples.
Analytical methods have real limits that a quality manager needs to state honestly. Lateral flow devices are qualitative or semi-quantitative and are screening tools. Quantitative ELISA depends on the antibody, on the reference material and on the food matrix, and results between kits are not interchangeable. PCR detects the DNA of the source species, not the protein, which makes it useful for species identification and unreliable as a proxy for protein presence in a highly processed ingredient. Mass spectrometry is the emerging confirmatory route and is not yet routine at line level.
Where VITAL sits
The Voluntary Incidental Trace Allergen Labelling programme, VITAL, published by the Allergen Bureau and now in its third edition, provides a structured way to decide whether a precautionary statement is justified. It works from published reference doses, expressed as an eliciting dose for a defined small proportion of the allergic population, converts that into an action level in the finished food using the serving size, and produces a decision: no statement, or a defined precautionary statement.
Two things must be said about it plainly. First, it is the most defensible framework available for a decision that the law leaves open, and using it demonstrates that the statement rests on a quantitative rationale rather than on legal reflex. Second, it has no legal force in the Union. It is industry guidance. A VITAL assessment does not make a precautionary statement compliant, and it does not exempt a site from the Annex II declaration for anything intentionally present. It answers only the question of what to do about unintended cross-contact after the controls have been applied. What a VITAL 3.0 assessment involves sets out the mechanics.
What a buyer should ask for
An allergen questionnaire that returns useful information asks for evidence, not for assurances.
- The site allergen list, covering every allergen handled anywhere on site, not only those in the product being quoted.
- A line and equipment map showing which allergens share which equipment, including intake, conveying, milling, sieving and packing.
- The cleaning validation report for the worst-case changeover that affects your product, with the acceptance criterion and the method stated.
- Recent verification results, not a statement that verification is performed.
- The rationale for any precautionary statement on the product, and the rationale for its absence where it is absent.
- The traceability test result, mass balance included, from a recent mock recall involving an allergenic ingredient.
- Change notification commitments: written notice before a new allergen is introduced to the site or to shared equipment. This is the clause most often missing and the one that causes the most disruption when it is needed.
The clause to write
Require the supplier to declare all allergens present on site and on shared equipment, to notify in writing before any change to that list, to apply precautionary labelling only on the basis of a documented risk assessment, to hold a current cleaning validation for changeovers affecting the supplied product, and to provide verification results on request. State that any change to the allergen status of the product requires written agreement before shipment. EU allergen labelling requirements covers the labelling side in more detail, and plant-based protein sourcing deals with the supplier questions specific to protein ingredients.