Most restaurant owners get confused about those "may contain traces of" labels on ingredient packaging. These statements are voluntary warnings manufacturers use to protect themselves from cross-contamination lawsuits. You're not legally required to relay these warnings to guests, though doing so with severe allergy cases shows good judgment.
Difference between mandatory allergens and trace statements
Food packaging shows two distinct types of allergen information:
- Mandatory allergens: Ingredients actually added to the product (e.g., "contains eggs")
- Trace statement: Products possibly contaminated during manufacturing ("may contain traces of nuts")
💡 Example:
A nut-free cookie manufactured in a facility that also makes nut cookies:
- Ingredient list: wheat flour, sugar, butter, eggs
- Allergen statement: Contains gluten and eggs (mandatory)
- Trace statement: "May contain traces of nuts" (voluntary)
You're only obligated to communicate the mandatory allergens to guests.
What does the law say exactly?
EU regulation (1169/2011) mandates restaurants provide information about the 14 main allergens that have been intentionally added as ingredients. Trace statements fall outside this requirement.
⚠️ Note:
While you're not required to communicate trace statements, guests with severe allergies (anaphylaxis) deserve extra caution.
Practical approach in your kitchen
Most successful restaurants follow this protocol:
- Standard practice: Only communicate mandatory allergens
- Severe allergy cases: Mention possible traces if guests specifically inquire
- Documentation: Record actual ingredients only, not trace statements
💡 Example:
Guest asks: "Are there nuts in the brownie?"
Response: "No nuts in the brownie. It does contain gluten, eggs, and milk."
If the guest mentions a severe nut allergy, you might add: "Our chocolate supplier does note 'may contain traces of nuts' on their packaging."
When to mention it anyway?
Certain situations warrant mentioning trace statements - a pattern we see repeatedly in restaurant financials shows that establishments handling severe allergies with extra care face fewer liability issues:
- Guest reveals they have a life-threatening allergy
- Guest directly asks about potential cross-contamination
- You prefer being overly cautious for liability protection
Registration in your system
In your allergen tracking system you should document:
- Include: All ingredients actually present in the dish
- Exclude: "May contain traces of" statements
- Consider: A separate notes field for trace information if you want that reference
💡 Example registration:
Chocolate cake ingredients:
- Flour (gluten) ✓
- Eggs ✓
- Butter (milk) ✓
- Dark chocolate ("may contain traces of nuts") → Register as: no nuts
System entry: Contains gluten, eggs, milk
How do you handle trace statements? (step by step)
Check the ingredient list
Look at the packaging for the ingredient list. Only note ingredients that are actually in the product, not the "may contain traces of" text below it.
Register the actual allergens
Enter in your system only the allergens that have been added as ingredients. Trace statements don't need to be in your standard allergen registration.
Inform guests correctly
Tell guests which allergens are in the dish. With very serious allergies, you can voluntarily also share trace information if the guest asks about it.
✨ Pro tip
Review your allergen documentation system every 3 months to ensure you're tracking actual ingredients, not trace statements. Only communicate trace warnings for guests with severe allergies who specifically ask.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Do I have to communicate "may contain traces of" to all guests?
No, that's not required. You only need to communicate allergens that are actually ingredients in the dish.
What if a guest has a life-threatening allergy?
You can voluntarily mention trace statements in these cases. It's not legally required, but shows responsible service.
Can I be held liable for not mentioning trace statements?
Legally, you're not required to communicate trace information. Correctly communicating mandatory allergens satisfies legal requirements.
How should I document this in my tracking system?
Document only actual ingredients containing allergens. "May contain traces of" doesn't require standard tracking, unless you prefer that extra reference.
What if my supplier only lists a trace statement?
If there are no actual allergens present (only possible traces), you don't need to communicate that as allergen information to guests.
Should I train staff differently for trace statements versus actual allergens?
Train staff to clearly distinguish between mandatory allergen disclosure and voluntary trace information. Staff should know when each type of communication is appropriate.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
Allergen registration that's truly compliant
EU legislation requires allergen documentation for every dish. KitchenNmbrs automatically generates allergen matrices based on your ingredients. Try it free for 14 days.
Start free trial →