Food Allergens Safety: What Restaurant Owners Should Know

Food allergen safety requires more than menu labels. Restaurants need a reliable process for order management, allergen identification, allergy request handling, cross-contact prevention, and staff training.

The World Health Organization estimates that more than 220 million people worldwide have food allergies. Reactions can range from mild symptoms to anaphylaxis, a potentially life-threatening reaction.

Restaurants can’t eliminate that risk, but they can reduce it and communicate clearly what the kitchen can and cannot safely serve.

The 9 major food allergens recognized under U.S. law

US law recognizes nine major food allergens. The first eight food allergens- milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans were identified under the Food Allergen Labeling and Consumer Protection Act of 2004. 

Sesame became the ninth major food allergen under the Food Allergy Safety, Treatment, Education, and Research (FASTER) Act, effective January 1, 2023.

Major allergen	Specific examples/products
Milk	Milk, buttermilk, whey, casein, cheese, butter, cream, yogurt
Eggs	Whole eggs, egg whites, egg yolks, mayonnaise, some baked goods
Fish	Salmon, tuna, cod, bass, flounder
Crustacean shellfish	Shrimp, crab, lobster
Tree nuts	Almonds, pecans, walnuts, cashews, pistachios
Peanuts	Peanuts, peanut butter, peanut flour, peanut-containing sauces
Wheat	Wheat flour, bread, pasta, cereals, baked goods
Soybeans	Soybeans, tofu, soy sauce, soybean oil, lecithin (soy)
Sesame	Sesame seeds, tahini, sesame oil, sesame-containing breads

This list is a U.S. regulatory framework. Other countries may recognize different allergens or have different food-labeling and disclosure requirements. 

Restaurants should follow the food-safety and allergen rules that apply in their location.

Signs of an allergic reaction

The Food and Drug Administration (FDA, 2026) notes that food-allergy symptoms can appear within minutes to a few hours after eating the food. Symptoms can vary from person to person and from one reaction to another.

Mild to moderate symptoms

• Hives
• Flushed skin or rash
• Itching or tingling in the mouth
• Swelling of the face, lips, or tongue
• Vomiting or diarrhea
• Abdominal cramps

Potentially severe symptoms (Anaphylaxis)

• Coughing or wheezing
• Difficulty breathing
• Swelling of the throat or vocal cords
• Dizziness or lightheadedness
• Loss of consciousness

Severe reactions can develop into anaphylaxis, which requires immediate medical attention. Train staff to follow your emergency procedures and call for medical help the moment a customer shows any most common food allergies or signs of a severe reaction; don’t wait to see if it worsens.

What happens when allergen communication fails

Case study: Anaphylaxis attack incident  A 2023 incident involving Dr. Kanokporn Tangsuan demonstrates the serious consequences of poor allergen communication. She died after experiencing anaphylaxis following a meal at a restaurant after reportedly informing staff about her severe dairy and nut allergies

The importance of food safety is to protect vulnerable people around you.

The case highlights a valuable lesson for restaurants: never make a “safe” claim unless the ingredients and preparation process have been verified.

Restaurant staff should follow their emergency procedures and seek emergency medical assistance when a customer experiences any types of food allergies or any  signs of a severe allergic reaction.

How to identify food allergens in product ingredients

1. Learn common allergen sources

Some allergens may appear under ingredient names that employees do not immediately recognize.

For example:

• Milk: whey, casein, butter, cream
• Egg: albumin, mayonnaise
• Soy: tofu, soy sauce, soybean oil, soy lecithin
• Sesame: tahini, sesame oil, sesame seeds
• Wheat: wheat flour, bread, pasta

Employees responsible for purchasing, recipes, menus, and food preparation should know the common allergen sources found in the restaurant's ingredients.

2. Review the full ingredient list

For packaged products in the U.S., major allergens may appear in the ingredient list, in parentheses after an ingredient, or in a “Contains” statement.

A “Contains” statement can make allergens easier to identify, but staff should still review the available ingredient information.

Do not assume a product is unchanged just because the brand or product name is familiar.

3. Treat imported products with extra care

According to Food Allergy Research & Education (FARE, 2025), imported food products sold in the U.S. are expected to comply with applicable U.S. food-labeling laws.

Do not purchase products without clear ingredient and allergen information. 

Make sure the label provides English-language information that allows you to accurately identify the ingredients and potential allergens.

4. Do not rely only on “free-from” claims alone

Don't rely solely on “peanut-free” or “egg-free” claims, because the same facility may also process peanuts or eggs, creating a possibility of cross-contact.

If the available information is unclear, contact the manufacturer or restaurant food supplier before deciding whether the ingredient can be used.

5. Check every ingredient component

Pay particular attention to:

• Marinades
• Sauces
• Dressings
• Spice blends
• Seasonings
• Toppings
• Garnishes
• Desserts
• Prepared meats
• Pre-made fillings

For example, a seemingly simple chicken dish may contain a marinade, seasoning blend, or sauce containing soy, wheat, milk, or sesame.

Check every component of the recipe rather than only the main ingredient.

5 food allergen safety practices every restaurant should follow

1. Label allergens on your digital menu

A digital menu can display allergen information, ingredient notes, and relevant modifiers in one accessible location. 

When listing allergens in your digital menu, be specific where appropriate. 

For example, identifying shrimp can provide more useful information than simply using the broad term “shellfish.”

Most importantly, do not treat an allergen icon or menu label as proof that a dish is safe. Menu information is only one part of the restaurant's allergen-management process.

2. Train staff and use a standard allergy procedure

Centers for Disease Control and Prevention (CDC, 2024)  research found gaps in restaurant food-allergy knowledge and training. 

The CDC recommends staff training, ingredient lists or recipes, separate equipment or preparation areas when feasible, and a plan for serving customers with food allergies.

A simple restaurant training manual on food allergy procedure can be:

The exact procedure should be adapted to the restaurant's operation and local food-safety requirements.

3. Prevent cross-contact

Understanding how cross-contact occurs is important because an allergen can be accidentally transferred from one food to another.

Restaurants can reduce the risk by:

• Keeping allergenic ingredients properly stored and identified
• Using separate equipment and preparation areas when feasible
• Cleaning and sanitizing surfaces before preparing allergy-sensitive orders
• Using properly cleaned utensils and cookware
• Preventing ingredients from being transferred between containers
• Keeping staff aware of shared equipment

Pay particular attention to potential cross-contact points such as:

• Shared fryers
• Cutting boards
• Knives
• Tongs
• Grills
• Mixers
• Food processors
• Storage containers
• Preparation surfaces
• Gloves

If separate equipment or preparation areas are not available, the CDC recommends thoroughly cleaning and sanitizing relevant surfaces and equipment as part of effective kitchen management before preparing food for customers with allergies.

4. Be honest about what the restaurant can safely serve

If the kitchen cannot verify the ingredients or cannot adequately control cross-contact, tell the customer that the restaurant cannot safely accommodate the request.

Prioritizing restaurant safety means being transparent about these limitations. 

An honest limitation is safer than a false guarantee.

5. Keep allergen information up to date

Treat allergen information as an operational record, not a one-time menu task.

Regularly review:

• Recipes
• Ingredient labels
• Supplier information
• Menu descriptions
• Modifiers
• Sauces and toppings
• Allergen records

Recheck labels and supplier information when:

• A supplier changes
• A brand changes
• A product is replaced
• A recipe or formulation changes
• Packaging changes
• A new ingredient is introduced

Build this check into your purchasing and menu-update process instead of treating it as a one-time task.

Make food allergen safety a priority.

Food allergen safety requires a consistent process that starts with accurate ingredient information and continues through recipes, ordering, kitchen preparation, and service.

The most important rule for restaurant owners is simple: do not guess.

Give staff the information and procedures they need to identify allergens, prevent cross-contact, communicate clearly, label allergens accurately in your restaurant ordering system, and recognize when the restaurant cannot safely accommodate a request.

For U.S. restaurants, the nine major food allergens provide an important starting point. Combine accurate allergen records, staff training, clear customer communication, and practical kitchen controls to help protect customers with food allergies.

Frequently Asked Questions