QR Codes on Food Packaging for Allergen Information: Compliance and Best Practice

Allergen Labelling Law in the UK

UK Food Information Regulations require the 14 major allergens to be declared on pre-packed food. The 14 allergens are: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, peanuts, sesame, soybeans, sulphur dioxide and sulphites, tree nuts.

Natasha's Law (in effect since October 2021) extended mandatory allergen labelling to pre-packed for direct sale (PPDS) food — sandwiches, bakery items, and foods packaged on the premises before sale.

Important: QR codes cannot replace mandatory on-pack allergen labelling for pre-packed and PPDS foods under current UK law. All 14 allergens must be declared in text on the physical label. QR codes are a supplement providing additional depth, not a replacement.

Where QR Codes Add Value for Allergen Information

Full ingredient list: Where packaging space is limited (very small pack, cosmetics-style format), a QR linking to the full ingredient list and allergen information provides depth beyond what fits in print. The mandatory allergen declaration still appears on-pack.

Recipe and reformulation tracking: When a recipe changes, a QR-linked digital ingredient page can be updated immediately. Consumers who scan get the current formulation. Printed packs in circulation with the old recipe still have the mandatory label — the QR provides advance notice of any change.

Multilingual allergen information: A QR links to the ingredient and allergen information in multiple languages — critical for imported products or products sold in multilingual markets. The UK legal requirement is fulfilled in English; additional languages via QR serve a broader consumer audience.

Detailed severity guidance: The mandatory label says "Contains gluten." A QR-linked page can explain: "This product is manufactured in a facility that also processes peanuts — there is a risk of cross-contamination. Not suitable for consumers with severe peanut allergy." This depth of information cannot reasonably fit on a physical label.

The FSA and QR Code Allergen Guidance

The Food Standards Agency has published guidance on QR codes for allergen information. Key points:

- QR codes are not permitted as the sole mechanism for allergen disclosure on pre-packed food - They are acceptable as supplementary channels for additional detail - Any information accessible via QR that contradicts the on-pack mandatory label is a compliance risk

Review the most current FSA guidance before designing QR allergen communications.

Putting this into practice

Start with the smallest real test you can run. Generate the code, print it at the exact size you plan to use, and scan it with two different phones in the lighting where it will live. Check that the destination page loads quickly on a mobile connection and that the call to action next to the code tells people what they will get. If anything feels slow or unclear, fix it before you print a full batch, because reprints cost more than a short test. Keep a note of the size, material, and placement that worked so the next batch starts from a proven setup.

Common mistakes to avoid

The most common mistakes are easy to avoid once you know them. Long payloads make modules tiny, low contrast makes edges hard to read, and text placed too close to the border eats the quiet zone the scanner needs. Covering a corner finder pattern with a logo or a sticker breaks detection entirely, and a code placed behind glare or on a curved surface fails even when the print is perfect. Review each of these points on a proof copy, and treat any failure as a reason to adjust the design rather than a reason to blame the scanner.

Quick checklist

- Keep the payload as short as practical so modules stay large. - Keep dark modules on a light background with strong contrast. - Leave a clear quiet zone on all four sides of the symbol. - Test the printed code at the real viewing distance and lighting. - Confirm the destination page loads fast on a phone. - Recheck the code after any change to the link, design, or placement.

Related tools and guides

- For local payments, the [Pakistan payment QR](/pakistan-payment-qr) page explains the regional flow and what customers see. - The [regional payment QR](/regional-payment-qr) guide covers payment codes used across different markets. - Check print proofs with the [printed QR tester](/printed-qr-tester) so problems show up before a full run. - The [QR placement guide](/qr-placement-guide) covers height, lighting, glare, and surfaces that affect scan success. - The [bulk generator](/bulk-generator) builds many codes from a table when one-off generation would take too long. - Test every code with the [QR scanner](/qr-scanner) on more than one phone before you publish or print it.