A guest orders your signature chicken salad, but moments before serving, they mention a severe sulfite sensitivity. You scan the dish mentally - dried cranberries, wine reduction, roasted vegetables. Sulfites hide in more ingredients than most kitchen staff realize, and they're required by law to be disclosed if concentrations exceed 10 mg per kg or liter.
What are sulfites and where are they found?
Sulfites act as preservatives, extending shelf life and preventing that unappetizing brown discoloration in foods. They're deliberately added to many products, but wine naturally develops them during fermentation too.
💡 Example products containing sulfites:
- Dried fruits (apricots, raisins, dates)
- Wine and some beers
- Dried potato products
- Some fruit juices and syrups
- Canned vegetables and fruit
EU regulations for sulfites
EU regulation 1169/2011 mandates sulfite disclosure as an allergen once concentrations hit 10 mg per kg or liter. This threshold applies to every single ingredient in your dishes - no exceptions.
⚠️ Note:
Sulfite-sensitive individuals can experience severe asthmatic reactions within minutes. Accurate registration isn't just legal compliance - it's potentially life-saving.
How do you identify sulfites on labels?
Sulfites masquerade under multiple names on ingredient lists. Master these variations to catch them every time:
- E220-E228: The numbered sulfite family
- Sulfur dioxide: The classic form you'll see most
- Sodium bisulfite, potassium bisulfite: Chemical cousins with identical effects
- Metabisulfite: Wine industry favorite
Practical handling in the kitchen
Processing sulfite-containing products requires systematic attention to detail. But here's something most kitchen managers discover too late: sulfites concentrate during reduction cooking, making wine sauces particularly problematic for sensitive guests.
💡 Example kitchen routine:
For a salad with dried apricots:
- Verify dried apricots label for sulfite presence
- Log sulfite as allergen in recipe database
- Brief staff on proper guest communication
- Establish contamination-free prep protocols when necessary
Preventing cross-contamination
Sulfites transfer easily between dishes through shared equipment. Dedicate separate cutting boards and knives for sulfite-containing ingredients, particularly during prep for sensitive diners.
⚠️ Note:
Wine-based sauces retain sulfites even after extended cooking. Heat doesn't eliminate them, so mark every wine-reduced sauce as containing sulfites.
Digital registration of sulfites
Digital tracking systems like tools such as KitchenNmbrs streamline sulfite registration by ingredient. You'll instantly identify which menu items contain sulfites and provide accurate information to guests without guesswork.
💡 Example digital workflow:
- Tag sulfite presence with "dried apricots" ingredient
- System auto-flags sulfites in all recipes using this ingredient
- Service staff see sulfite alerts instantly
- Guest allergy inquiries get immediate, accurate responses
How do you register sulfites correctly in your kitchen?
Check all ingredient labels
Go through all your dried products, wines and preserves. Look for E220-E228, sulfur dioxide or other sulfite names on the ingredient list. Make a list of all products containing sulfites.
Register sulfites per ingredient
Note with each ingredient containing sulfites that it contains sulfite. In a digital system you can record this once per ingredient, after which it automatically applies to all recipes.
Train your staff
Make sure all employees know which dishes contain sulfites. Create clear overviews and regularly practice how to correctly inform guests about allergens.
✨ Pro tip
Audit your wine inventory every 3 months for sulfite content changes. Wineries occasionally adjust their sulfite levels between vintages, and that house red you've served safely for months might suddenly require allergen disclosure.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Do I have to mention sulfites in all quantities?
No, only if the concentration exceeds 10 mg per kg or liter. Most commercial products with sulfites far surpass this threshold and require disclosure.
Do sulfites disappear through cooking or baking?
Sulfites persist through most cooking methods, including high-heat baking. Even wine-reduced sauces and cooked dried fruit dishes must be flagged for sulfites.
How do I prevent cross-contamination with sulfites?
Designate separate cutting boards and utensils for sulfite-containing products. Thoroughly wash hands after handling and sanitize surfaces before preparing allergen-free items.
What if I forget to mention sulfites?
This creates serious liability for sensitive guests and violates food safety regulations. Health inspectors can impose substantial fines for missing allergen documentation.
Do all dried fruits contain sulfites?
No, sulfite-free dried fruits exist, particularly organic varieties. Always verify labels since processing methods vary between suppliers and brands.
Can I remove sulfites by rinsing dried fruits?
Rinsing may reduce surface sulfites slightly, but won't eliminate them completely. If a guest has sulfite sensitivity, use only certified sulfite-free dried fruits instead.
📚 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.
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