2.3 Food Allergens

ServSafe Food Protection Manager Certification Exam

Track your progress as you read

Finished sections get a check mark.

1 Introduction

Welcome to ServSafe Manager Certification

2 1. Providing Safe Food

1.1 Understanding Foodborne Illnesses 1.2 How Foodborne Illnesses Occur 1.3 Keeping Food Safe

3 2. Forms of Contamination

2.1 Biological Contaminants 2.2 Chemical and Physical Contaminants 2.3 Food Allergens 2.4 Deliberate Contamination and Outbreak Response

4 3. The Safe Food Handler

3.1 How Food Handlers Can Contaminate Food 3.2 Personal Hygiene Program 3.3 Policies for Reporting Illness and Injury

5 4. The Flow of Food: An Introduction

4.1 Hazards in the Flow of Food 4.2 Monitoring Time and Temperature

6 5. The Flow of Food: Purchasing, Receiving, and Storage

5.1 General Purchasing and Receiving Principles 5.2 Storing Food Safely

7 6. The Flow of Food: Preparation

6.1 Preparation Best Practices 6.2 Cooking Food to Safe Temperatures 6.3 Cooling and Reheating Food

8 7. The Flow of Food: Service

7.1 Holding Food for Service 7.2 Serving Food Safely

9 8. Food Safety Management Systems

8.1 Active Managerial Control and HACCP

10 9. Safe Facilities and Pest Management

9.1 Interior Design and Equipment Requirements 9.2 Utilities and Emergency Planning 9.3 Pest Management

11 10. Cleaning and Sanitizing

10.1 Cleaning and Sanitizing Principles 10.2 Chemical Sanitizers - CRITICAL! 10.3 Dishwashing 10.4 Facility Cleaning

2.3 Food Allergens

Key Takeaways Explain This Topic AI

The Big Nine allergens: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soy, sesame (added 2023)

Sesame became the 9th major allergen on January 1, 2023 (FASTER Act)

Anaphylaxis is a life-threatening allergic reaction requiring immediate 911 call

Cross-contact (not cross-contamination) is the term for allergen transfer

Never guess about allergens—verify all ingredients with chef

• Prevent cross-contact with separate equipment, clean surfaces, and proper procedures
• Last updated: January 2026

Food allergies affect approximately 32 million Americans , including 1 in 13 children. For those with severe allergies, even trace amounts of an allergen can cause life-threatening reactions. As a food service manager, understanding and preventing allergic reactions is a critical safety responsibility.

The Big Nine Major Allergens

The FDA identifies nine major food allergens responsible for over 90% of food allergic reactions in the United States. These are often called the Big Nine :

Allergen Common Foods Key Facts

Milk Dairy products, butter, cheese, yogurt, ice cream, whey, casein Most common food allergy in children; many outgrow it

Eggs Baked goods, mayonnaise, pasta, marshmallows, meringue Second most common childhood allergy

Fish Bass, flounder, cod, salmon, tuna, halibut, anchovies Must specify type on label; distinct from shellfish allergy

Crustacean Shellfish Shrimp, crab, lobster, crayfish, prawns One of the most severe allergens; rarely outgrown

Tree Nuts Almonds, cashews, walnuts, pecans, pistachios, macadamia, hazelnuts Life-threatening reactions common; includes coconut (FDA)

Peanuts Peanut butter, peanut oil (cold-pressed), many Asian dishes NOT a tree nut (it's a legume); one of most dangerous allergens

Wheat Bread, pasta, cereal, baked goods, soy sauce, beer Distinct from gluten sensitivity; includes all forms of wheat

Soybeans Tofu, soy milk, soy sauce, edamame, many processed foods Found in many unexpected foods as soy lecithin or oil

Sesame Tahini, hummus, sesame oil, baked goods with sesame seeds ADDED JANUARY 1, 2023 via FASTER Act; 9th major allergen

Critical Update: Sesame became the 9th major allergen on January 1, 2023 , under the Food Allergy Safety, Treatment, Education, and Research (FASTER) Act. This is heavily tested on current ServSafe exams.

Understanding Allergic Reactions

Food allergy - An abnormal immune system response to a food protein. The body mistakenly identifies the protein as harmful and launches an immune attack.

Allergic reaction symptoms:

• Mild to Moderate: Hives, itching, swelling (lips, face, tongue), stomach cramps, vomiting, diarrhea
• Severe: Difficulty breathing, wheezing, tightness in throat, rapid pulse, drop in blood pressure
• Life-Threatening: Anaphylaxis (can cause death within minutes)
• Anaphylaxis: A Medical Emergency

Anaphylaxis (pronounced "an-uh-fuh-LAK-sis") is a severe, potentially life-threatening allergic reaction that can occur within seconds to minutes of exposure.

Symptoms of Anaphylaxis:

• Difficulty breathing or shortness of breath
• Swelling of throat and tongue (airway obstruction)
• Rapid, weak pulse
• Drop in blood pressure (shock)
• Dizziness, loss of consciousness
• Skin reactions (hives, flushed or pale skin)

Emergency Response:

• Call 911 immediately
• Help person use epinephrine auto-injector (EpiPen) if available
• Have person lie down with legs elevated (unless difficulty breathing)
• Monitor breathing and pulse
• Be prepared to perform CPR if needed
• Even if symptoms improve, person MUST go to hospital (symptoms can return)

For the Exam: Know that anaphylaxis is a medical emergency requiring immediate 911 call. Even if symptoms improve after epinephrine, the person must still receive medical attention.

Cross-Contact vs. Cross-Contamination

Important Distinction:

• Cross-Contamination - Transfer of pathogens (bacteria, viruses) from one food to another
• Example: Raw chicken juice drips onto salad
• Cross-Contact - Transfer of food allergens from one food to another
• Example: Peanut butter knife used to spread jam, then served to peanut-allergic guest

Critical: The ServSafe exam uses the term "cross-contact" specifically for allergens. Using "cross-contamination" for allergens is technically incorrect.

How Cross-Contact Happens

• Source Example
• Shared Utensils Same tongs used for regular pasta and gluten-free pasta
• Shared Surfaces Cutting board used for bread, then for allergen-free sandwich
• Shared Equipment Slicer used for deli meat with milk, then for dairy-free meat
• Shared Oil Deep fryer used for breaded (wheat) items, then for allergen-free fries
• Hands/Gloves Handler touches cheese, doesn't change gloves, handles dairy-free meal
• Airborne Transfer Flour dust settles on nearby gluten-free ingredients
• Garnishes Shared container of nuts sprinkled on various dishes
• Preventing Cross-Contact

Preparation:

• Use separate, clean equipment for allergen-free orders (cutting boards, knives, pans)
• Prepare allergen-free meals first before cooking allergenic ingredients
• Use dedicated fryers for allergen-free items when possible
• Store allergen-free ingredients separately in covered containers

Service:

• Change gloves between handling allergenic and allergen-free foods
• Wash hands thoroughly before preparing allergen-free meals
• Use clean utensils for each dish
• Label allergen-free meals clearly in the kitchen
• Deliver allergen-free meals separately (different server or trip if possible)

Communication:

• Verify orders with kitchen staff ("This is the dairy-free meal for table 5")
• Confirm with servers what allergens to avoid
• Double-check ingredients in sauces, seasonings, garnishes
• Responding to Allergen Inquiries

When a guest asks about allergens, never guess . Follow this procedure:

• 1. Listen Carefully
• "Do you have a food allergy or intolerance?"
• "Which ingredient(s) do you need to avoid?"
• "How severe is your allergy?"
• 2. Check Everything
• Review recipe ingredients (including hidden allergens)
• Check manufacturer labels for processed items
• Verify cooking methods (shared fryers, grills)
• Ask chef if unsure
• 3. Communicate Clearly
• Tell the truth: "This dish contains [allergen]" or "I'll check with the chef"
• Explain risks: "We fry multiple items in shared oil"
• Offer alternatives: "Our grilled chicken is safe, and we can prepare it separately"
• Never say "I think it's safe" or "probably no allergens"
• 4. Notify Kitchen Staff
• Alert chef about allergen request
• Mark ticket clearly ("NO SHELLFISH - ALLERGY")
• Supervise preparation if possible
• Confirm allergen-free preparation before serving

For the Exam: Know that staff must take allergen requests seriously, verify ingredients, and clearly communicate with guests. Never guess or minimize the risk.

Hidden Allergens

Many ingredients contain hidden allergens that aren't obvious:

• Food Item May Contain
• Salad dressing Eggs (mayonnaise-based), fish (anchovies), soy
• Worcestershire sauce Fish (anchovies)
• Imitation crab (surimi) Egg whites, wheat, shellfish flavoring
• Marinades Soy sauce (wheat, soy), fish sauce
• Breaded items Milk, eggs, wheat
• Veggie burgers Wheat, soy, tree nuts, sesame
• Asian cuisine Peanuts, fish sauce, shellfish, sesame
• Baked goods Milk, eggs, wheat, tree nuts, sesame seeds

Prevention:

• Train staff on hidden allergens
• Read all ingredient labels thoroughly
• Keep updated ingredient lists for recipes
• Ask suppliers about ingredient changes
• Special Considerations

Labels and Menus:

• Federal law requires allergen labeling on packaged foods
• Many establishments voluntarily list allergens on menus
• Use clear symbols or statements: "Contains: Milk, Eggs, Wheat"

Buffets and Self-Service:

• High risk for cross-contact (shared serving utensils)
• Label all dishes with allergen information
• Provide individual serving utensils for each dish
• Consider advising guests with severe allergies to avoid buffets

Special Dietary Needs:

• Celiac disease - Requires strict gluten-free diet (wheat, barley, rye)
• Lactose intolerance - Different from milk allergy (digestive issue, not immune)
• Vegetarian/Vegan - Not allergies, but may overlap with allergen requests

The Big Nine Allergens (Approximate % of Food Allergic Reactions)