Allergen-Safe Shopping Ingredient Decoder (UK, 2026)

UK ingredient lists legally declare the 14 major allergens but under technical names (whey = milk, albumen = egg, arachis = peanut, lysozyme = egg, lactose = milk, triticale = gluten). This decoder scans ingredient text against your specific allergen profile using a synonym library of 100+ chemical / botanical names mapped back to the 14 FSA-declared allergens. It catches precautionary "may contain" warnings, parses PPDS (Natasha's Law) labelling, and modifies the risk verdict by severity (anaphylaxis / severe / moderate / mild). Also calculates the free-from price premium vs the original product.

⏱️ 2-4 minutes • 💪 Quick

Updated April 2026

How This Tool Works

📋 Purpose

UK ingredient lists legally declare the 14 major allergens but under technical names (whey = milk, albumen = egg, arachis = peanut). This tool decodes ingredient lists against your specific allergen profile, flags precautionary labelling, and advises on severity-appropriate risk — so you don\u2019t miss a hidden allergen at the checkout.

⚙️ How It Works

  1. 1
    Select the allergens you need to avoid from the 14 UK majors.
  2. 2
    Set severity (anaphylaxis / severe / moderate / mild).
  3. 3
    Copy the "Contains:" line from the pack.
  4. 4
    Paste the full ingredient list (including any "may contain" statements).
  5. 5
    We scan the text for ingredient synonyms (100+ names → 14 allergens).
  6. 6
    We flag matches as critical (declared), high (ingredient), moderate (may-contain).
  7. 7
    Severity modifies how "may contain" is treated for the final verdict.
  8. 8
    Optional: enter prices for Free-From premium and Nutri-Score context.

Allergen-Safe Shopping — 2026

Paste a product’s ingredient list and get a risk verdict for your allergens.

Under FIR 1169/2011 and Natasha’s Law, UK manufacturers must declare the 14 major allergens in the ingredient list. But ingredient names are deliberately varied (whey = milk, albumen = egg, arachis = peanut). This tool decodes the 14 allergens using ingredient-phrase synonyms, flags precautionary “may contain” warnings, and tells you whether the product is safe for your specific allergen set and severity.

Your allergen profile

Product to check

Copy the emphasised allergens from the ingredient list, or the “Contains: X, Y” statement.

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Complete Guide: Reading UK Food Labels for Allergens

The 14 major UK allergens, their synonyms, precautionary labelling, and how to shop safely on a budget.

📅 Last updated: April 2026

Quick Tips

Jump-start your understanding with these essential tips

Tesco, Sainsbury's and ASDA Free From ranges are ~20–40% cheaper than branded alternatives (Genius, BFree, Schär). Quality is competitive for most categories.

Faster than photographing every pack — openfoodfacts.org has full ingredients + Nutri-Score for most UK supermarket lines. Search by barcode or product name.

Gluten-free bread can be 40% more fat; oat milk can be 2× sugar. Always cross-check Nutri-Score when swapping, don't assume "free from" = healthier.

Brand websites usually have a "contact us" form. Ask specifically about dedicated allergen-free lines and third-party cross-contamination testing.

Annual UK awards for safest/best free-from products. Winners are reliably well-labelled and widely available.

Step-by-Step Guide

Follow these steps to get the most from this tool

Tick every allergen you need to avoid from the 14 FSA majors. Family member setup: do this once for each person and save the profile.

Anaphylaxis-grade = EpiPen carried. Severe = hospitalisation risk. Moderate = discomfort but some tolerance. The severity controls how strictly "may contain" warnings are treated.

Most UK products list allergens after "Contains:" or emphasise them in the ingredient list. Copy the emphasised words into the "declared" field.

Include the full list AND any "may contain / produced in a facility" statements. More text = better decoding. Open Food Facts is the fastest source.

Enter the Nutri-Score for nutrition context and the alternative price to calculate the free-from premium.

Unsafe = declared or ingredient-phrase match. Caution = may-contain or moderate-risk match. Safe = no matches on declared ingredients. Severity-adjusted.

Once you've verified a product, pin the brand/SKU. Recipes change without notice — re-check on first purchase of a new batch if the pack looks different.

Advanced Topics

Deep dives for advanced users

Milk: whey, casein, lactose, butter, cheese, yoghurt, cream, ghee. Eggs: albumen, ovalbumin, lysozyme, globulin. Gluten: wheat, barley, rye, spelt, kamut, semolina, bulgur, couscous, triticale, farro, malt, seitan. Peanuts: arachis, groundnut. Soya: edamame, tofu, tempeh, miso, natto. Sulphites: sulphite, sulfite, sulphur dioxide, E220–E228.

Anaphylaxis UK guidance: "may contain" is voluntary and there is no legal threshold. Research (FSA 2021 study) shows many products with no PAL do have detectable traces, and many with PAL have none. The only reliable path for severe allergy is dedicated allergen-free lines with third-party testing (e.g. "certified gluten-free" crossed-grain trademark from Coeliac UK).

Coeliac UK's crossed-grain symbol requires <20ppm gluten and dedicated testing. Safer than "gluten free" claim alone (which only needs <20ppm but no third-party verification). Look for it on flour blends, breads, pastas.

1) Cook from scratch with naturally free-from base ingredients (rice, potato, meat, eggs if tolerated). 2) Buy free-from own-brand in bulk during supermarket offers. 3) Use Ocado and Tesco multi-buys on reliable brands. 4) Coeliac UK offers a "Food & Drink Directory" app for members with verified-safe lists.

Grocery Basket Smart Swap, Meal Prep & Leftover Value, Basket Split Optimiser.

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