The 14 Regulated Food Allergens Explained | UK Food Law Guide
Written by Dr. Simon Khela MBChB MRCGP, GMC Registered Doctor
Last reviewed: 31-07-2026
_________________________________________________________________________
A patient of mine, a mother of a seven-year-old with a peanut allergy, once described the genuine anxiety of ordering food at a new restaurant, not knowing whether a dish described simply as “satay sauce” would trigger a reaction serious enough to need her daughter’s adrenaline auto-injector. That kind of vigilance, reading every label, asking every question, is the daily reality for a significant number of UK families, and it’s precisely why food allergen law exists in the form it does.
In the UK and EU, 14 specific food allergens are legally recognised as responsible for the vast majority of serious allergic reactions, and food businesses are required by law to declare them. Understanding what they are, and why they’re regulated the way they are, matters for anyone managing a food allergy, cooking for someone who has one, or simply trying to make sense of an ingredients label.
What Are the 14 Regulated Food Allergens?
The 14 food allergens legally regulated in the UK and EU are:
- Celery
- Cereals containing gluten (wheat, rye, barley, oats)
- Crustaceans (such as prawns, crab, and lobster)
- Eggs
- Fish
- Lupin
- Milk
- Molluscs (such as mussels and oysters)
- Mustard
- Peanuts
- Sesame
- Soybeans
- Sulphur dioxide and sulphites (above 10 parts per million)
- Tree nuts (such as almonds, hazelnuts, walnuts, cashews, and pistachios)
By law, food businesses in the UK must clearly declare if any of these 14 allergens are used as ingredients, whether the food is pre-packed, sold loose, or served in a restaurant or café. This applies even to businesses with only one or two staff, not just large manufacturers.
Why These 14 Allergens Are Specifically Regulated
Many patients are surprised to learn that these particular 14 were chosen because they’re responsible for the substantial majority of serious allergic and intolerance reactions to food, based on evidence reviewed when the regulation was introduced. That doesn’t mean other foods can’t cause a serious reaction, they genuinely can, but these 14 represent the most common and most consistently significant triggers.
- The list is set out in UK food law (retained from the EU Food Information for Consumers Regulation) and enforced by the Food Standards Agency
- It applies to all food businesses selling food to the public, regardless of size
- Allergen information must be clear and accessible, not buried in small print or only available on request in some cases
- The list is occasionally reviewed, and there’s ongoing discussion, including from allergy charities, about whether other foods, such as certain legumes, deserve similar formal recognition as reactions to them become more widely reported
The 14 Regulated Food Allergens Explained
| Allergen | Examples and Common Sources | Notes |
|---|---|---|
| Celery | Celery stalks, leaves, seeds, celeriac | Often hidden in stock cubes, soups, and salads. |
| Cereals containing gluten | Wheat, rye, barley, oats | Relevant to both wheat allergy and coeliac disease, which are different conditions. |
| Crustaceans | Prawns, crab, lobster, crayfish | Common in Asian cuisines, sauces, and stock. |
| Eggs | Whole eggs, egg powder, albumin | One of the most common allergies in young children, often outgrown. |
| Fish | Cod, salmon, anchovy, fish sauce | Worcestershire sauce and Caesar dressing are common hidden sources. |
| Lupin | Lupin flour and seeds | Increasingly used in gluten-free baking. |
| Milk | Cow’s milk, butter, cheese, whey, casein | Distinct from lactose intolerance, which isn’t an allergy. |
| Molluscs | Mussels, oysters, squid, snails | Can trigger reactions separately from crustacean allergy. |
| Mustard | Mustard seeds, powder, prepared mustard | Common in dressings, marinades, and processed meats. |
| Peanuts | Peanuts, peanut oil, peanut flour | A legume, not a tree nut, though often grouped with nut allergies. |
| Sesame | Sesame seeds, tahini, sesame oil | Increasingly recognised as a significant allergen in the UK. |
| Soybeans | Soy sauce, tofu, soy lecithin | Widely used as an additive in processed foods. |
| Sulphur dioxide and sulphites | Dried fruit, wine, some sausages | Regulated above 10 parts per million; can trigger asthma-like symptoms. |
| Tree nuts | Almonds, hazelnuts, walnuts, cashews, pistachios | Distinct from peanut allergy, though the two can coexist. |
UK Allergen Labelling Law: What You Need to Know
- Under the Food Information Regulations, any of the 14 allergens used as an ingredient must be emphasised on the label, typically in bold, capitals, or a different colour or font
- Natasha’s Law, introduced in October 2021 following the death of teenager Natasha Ednan-Laperouse after an allergic reaction to a sandwich with incomplete labelling, requires food pre-packed for direct sale (PPDS), such as sandwiches made and packaged on-site, to carry a full ingredients list with allergens clearly highlighted
- For food that isn’t pre-packed, including restaurant meals, allergen information must still be provided, either on a menu, a sign, or verbally by trained staff, but the format has more flexibility than packaged food
- “May contain” or “produced in a factory that also handles” statements are precautionary, used voluntarily by manufacturers where cross-contamination risk exists, and aren’t a formal part of the 14-allergen legal declaration, though they’re genuinely important for people with severe allergies to take seriously
Food Allergy vs Food Intolerance vs Coeliac Disease
A question I’m frequently asked is how to tell these apart, since the symptoms can sometimes overlap and the terms get used loosely.
- Food allergy involves the immune system reacting to a specific protein, and reactions can be immediate and, in some cases, life-threatening. This is what the 14 regulated allergens are primarily designed to protect against
- Food intolerance, such as lactose intolerance, doesn’t involve the immune system in the same way, tends to cause digestive symptoms like bloating or discomfort, and generally isn’t life-threatening, even though it can be genuinely unpleasant
- Coeliac disease is an autoimmune condition triggered by gluten specifically, causing damage to the gut lining rather than a typical allergic reaction, and requires strict, lifelong avoidance of gluten rather than the more variable thresholds sometimes possible with other food sensitivities
Many patients are surprised to learn that a milk allergy and lactose intolerance, for instance, are entirely different conditions with different mechanisms, different risks, and different management, despite both involving dairy.
Symptoms of a Food Allergic Reaction
Mild to Moderate Symptoms
- Itchy skin, hives, or a raised rash
- Swelling of the lips, face, or eyes
- Stomach pain, nausea, or vomiting
- Sneezing or a runny nose
Severe Symptoms (Anaphylaxis) — Medical Emergency
- Swelling of the throat or tongue
- Difficulty breathing, wheezing, or a tight chest
- A sudden drop in blood pressure, causing dizziness or fainting
- A sense of impending doom, alongside physical symptoms
- Loss of consciousness
Anaphylaxis requires immediate emergency treatment. If someone has been prescribed an adrenaline auto-injector, it should be used promptly, followed by a 999 call, even if symptoms seem to improve afterwards.
What to Do If You Have a Reaction
- For mild symptoms, an antihistamine can help, and the person should be monitored for any worsening
- For signs of anaphylaxis, use an adrenaline auto-injector immediately if one is available and prescribed, then call 999
- Always seek emergency medical assessment after anaphylaxis, even after adrenaline has been given, since symptoms can return
- If a reaction happens without a clear known cause, it’s worth keeping a note of what was eaten and when symptoms started, which can help enormously with diagnosis afterwards
Getting Tested for a Food Allergy
- Skin prick testing, where a small amount of the suspected allergen is placed on the skin to look for a reaction
- Specific IgE blood tests, measuring the immune response to particular foods, often arranged as part of a private blood test alongside a wider clinical assessment
- Oral food challenges, carried out under medical supervision, considered the most definitive test but only done in specialist settings due to the small risk of triggering a genuine reaction
- Elimination diets, removing a suspected food for a period and reintroducing it under guidance, sometimes used alongside other tests
If you suspect a food allergy, particularly following a reaction, allergy testing can help confirm or rule out specific triggers rather than relying on guesswork or unnecessarily avoiding a wide range of foods.
Common Myths and Misconceptions
“If a reaction was mild once, it’ll always be mild.”
Not necessarily. Reaction severity can vary between exposures, and a previously mild reaction doesn’t guarantee future reactions will be mild too.
“‘May contain’ labels are just legal caution and can usually be ignored.”
For anyone with a severe allergy, these precautionary statements should be taken seriously, since they reflect a genuine, if variable, cross-contamination risk.
“Food intolerances are just a mild version of food allergies.”
They’re different mechanisms entirely. Intolerances don’t involve the immune system in the same way and aren’t associated with anaphylaxis, even though symptoms can still be significant.
“Children always grow out of food allergies.”
Some allergies, particularly to egg and milk, are often outgrown in childhood, but others, including peanut and tree nut allergies, are more likely to persist into adulthood.
“Coeliac disease is just a gluten intolerance.”
Coeliac disease is an autoimmune condition causing gut damage, not simply a sensitivity, which is why the distinction matters for diagnosis and management.
Benefits and Limitations of Allergen Labelling
Current UK allergen labelling law has genuinely improved safety for people with food allergies, giving much clearer, more consistent information than existed previously, particularly following Natasha’s Law’s tightening of rules around pre-packed food.
That said, it isn’t a complete safeguard. Cross-contamination in kitchens, inconsistent staff training in smaller food outlets, and the voluntary, unregulated nature of “may contain” warnings all mean that people with severe allergies still need to exercise judgement and caution, rather than relying on labelling alone to guarantee safety.
When to See a GP
- After any reaction that raises suspicion of a genuine food allergy, even if it settled without emergency treatment
- If you’re unsure whether previous reactions were an allergy, an intolerance, or unrelated
- If you have a family history of severe food allergies and want a clearer picture of your own risk
- If a child’s reaction pattern is unclear and needs proper assessment before foods are avoided unnecessarily
Are You Worried About a Food Allergy?
Developed hives, swelling, stomach pain or difficulty breathing after eating? Don’t ignore symptoms that could indicate a food allergy.
Same-day private GP appointments available. Allergy assessment, testing referrals, treatment advice and personalised management plans. No referral needed.
An online GP consultation or a private GP appointment is a reasonable starting point to discuss symptoms and arrange appropriate testing. For anyone with a confirmed or suspected severe allergy, a referral to a specialist such as an allergist can provide a formal management plan, and where needed, a private prescription for antihistamines or an adrenaline auto-injector.
Select a Private GP Clinic near your location now:
