Allergen Control Workflow | GMPify Training

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Allergen Control - Preventing Cross-Contact and Ensuring Accurate Labeling

Food allergen controls are one of the four preventive control types under FSMA. They require a facility to identify the major food allergens in its products, prevent unintended cross-contact during receiving, storage, processing, and rework, and make sure every finished food label declares the allergens it contains. A single labeling error or missed changeover can send an allergic consumer to hospital and trigger a recall. This map follows the pathway from allergen identification through control design, implementation, and verification.

21 CFR 117.135(c)(2) · FD&C Act 403(w) · FALCPA · FASTER Act

21 CFR 117.135(c)(2)

FD&C Act 403(w)

FALCPA / FASTER Act

Major Food Allergens

The nine allergens FDA regulates as major: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame.

Basis: FALCPA and FASTER Act

Cross-Contact

The unintentional incorporation of a food allergen into a food that is not intended to contain it.

Basis: Equipment, people, and rework

Allergen Controls

Segregation, scheduling, cleaning, and labeling procedures that prevent cross-contact and misbranding.

Basis: Written and verified procedures

Label Accuracy

Every major allergen present, including those from sub-ingredients and rework, declared on the finished food label.

Basis: Label review and reconciliation

Phase 1

Allergen Identification and Hazard Analysis

1Identify allergens in every ingredient, rework, and processing aid

Allergen content confirmed from supplier specifications for each material, including sub-ingredients and compound flavors.

21 CFR 117.130 · 117.3

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2Map allergens across lines, equipment, and storage

Which allergens are handled where, on which shared equipment, and in what storage locations documented in an allergen matrix.

21 CFR 117.130

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3Evaluate cross-contact risks

Equipment, utensils, people, airborne dust, scheduling, and rework assessed as routes for unintended allergen transfer.

21 CFR 117.130(c)

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4Document the allergen hazard analysis

Allergen hazards requiring a preventive control recorded within the written hazard analysis, with reasoning.

21 CFR 117.126(b)

Phase 2

Allergen Control Design

Can segregation or scheduling alone prevent cross-contact?

YES → Segregate or schedule NO → Clean and verify between products

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5Establish segregation and scheduling controls

Dedicated equipment, color-coded tools, separate storage, and production sequencing that runs allergen-free products first.

21 CFR 117.135(c)(2)

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6Establish allergen cleaning procedures

Defined cleaning methods and verification between allergen changeovers, with dry and wet methods chosen to suit the equipment.

21 CFR 117.135(c)(2)

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7Establish labeling controls

Label review, correct label to correct product at line start-up, reconciliation, and control of rework and supplier label changes.

21 CFR 117.135(c)(2) · FD&C Act 403(w)

Phase 3

Implementation and Records

8Write procedures and train employees

Allergen control procedures documented, and staff trained to follow them and to understand why cross-contact matters.

21 CFR 117.126 · 117.4

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9Monitor changeovers and label use

Pre-operation allergen checks and label verification performed and recorded at line start-up and at each product change.

21 CFR 117.145

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10Take corrective action on any deviation

Affected product held and evaluated, cause corrected, and a recall assessment made if undeclared allergen product may have shipped.

21 CFR 117.150

Phase 4

Verification and Reassessment

11Verify cleaning and label effectiveness

Visual inspection and allergen test methods, such as swabs and finished product testing, confirm the controls work.

21 CFR 117.165

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12Review records on time

Monitoring and corrective action records reviewed within 7 working days, or a documented reasonable period.

21 CFR 117.165(a)(4)

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13Reanalyze after any relevant change

Controls reanalyzed whenever a formulation, supplier, equipment, label, or process change could affect allergen risk.

21 CFR 117.170

Major Food Allergens (Overview)

The Original Eight

Milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, and soybeans, defined by FALCPA 2004.

FD&C Act 201(qq)

Sesame - the Ninth Allergen

Sesame became a major food allergen under the FASTER Act of 2021, with labeling required from 1 January 2023.

FASTER Act 2021

Naming the Source

Fish, crustacean shellfish, and tree nut labels must name the specific type, such as salmon, shrimp, or almond.

FD&C Act 403(w)

Allergen Changeover Sequence (Overview)

Stop and remove Production stops, product and ingredients from the previous run are removed, and the line is secured for cleaning.

Clean to the defined method Equipment is cleaned using the written method, with dry or wet cleaning matched to the equipment and the allergen involved.

Verify clean Visual inspection plus swab or other testing, as the plan requires, confirms no allergen residue remains before the line is released.

Release and record The line is released for the next product, the correct label is confirmed, and the changeover is documented and signed.

Key Allergen Control Outputs (Overview)

Allergen matrix A current view of which allergens are present in which ingredients, lines, and products.

Cleaning and verification records Evidence that each allergen changeover followed the method and that the result was confirmed.

Label control records Label review, line start-up checks, and reconciliation showing the right label went on the right product.

Reanalysis record Documented review after changes, confirming the controls remain adequate or recording what changed.

Allergen Control Quality Elements

Complete Allergen Inventory Every ingredient, sub-ingredient, processing aid, and rework stream has a confirmed allergen status.

Accurate Allergen Matrix Matrix kept current and tied to lines, equipment, and products so decisions are made from facts.

Segregation Discipline Dedicated tools, separate storage, and scheduling rules that people follow without exceptions.

Cleaning Effectiveness Methods proven in practice to remove allergen residue from the specific equipment they are used on.

Label Accuracy Every label matches the formulation, with a check that catches errors before product ships.

Rework Control Rework containing allergens added only to products that declare them, with clear identification and records.

Staff Awareness Operators, sanitation, and warehouse staff understand allergens and know when to stop and escalate.

Change Management Formulation, supplier, equipment, and label changes trigger an allergen review before they go live.

Never do this

Assume a changeover is clean without checking. Add allergen-containing rework to a product that does not declare it. Print or apply labels without reconciling them to the product. Accept a supplier ingredient change without reviewing its allergen status. Rely on a "may contain" statement in place of controls.

Cross-contact vs cross-contamination

Cross-contact is the unintentional transfer of an allergen to a food that is not meant to contain it. Cross-contamination usually refers to the transfer of microorganisms. A facility needs controls for both, but the verification tools and cleaning methods differ.

Precautionary labeling is not a control

A statement such as "may contain" is voluntary and does not replace good manufacturing practice. FDA expects allergen cross-contact to be controlled, and the statement should not be used to cover for poor controls or labeling errors.

Key regulations

21 CFR 117.135(c)(2) - food allergen controls. 21 CFR 117.145 and 117.150 - monitoring and corrective actions. 21 CFR 117.160(c) - validation is not required for allergen controls, but verification of effectiveness is. FD&C Act 403(w) - allergen labeling. FALCPA 2004 and FASTER Act 2021.