Your guest has a food allergy. Before you cook or serve, find out what is in it — including the hidden sources most people miss.
Quick lookup — tap a major allergen:
Every answer cites FDA FALCPA/FASTER Act and FARE. We do not predict severity or cross-contamination — that depends on the individual and the manufacturer.
The 9 FDA-recognized major allergens and their hidden sources
| Allergen | Common obvious sources | Hidden sources | Source document | Last updated |
|---|---|---|---|---|
| 🥛 Milk | Cow milk, Cheese, Butter, Yogurt… | 6 hidden sources | FDA FALCPA 2004 + FARE Milk Allergy Avoidance Guide | January 2024 |
| 🥚 Eggs | Whole eggs, Egg whites, Mayonnaise, Meringue… | 6 hidden sources | FDA FALCPA 2004 + FARE Egg Allergy Avoidance Guide | January 2024 |
| 🐟 Fish | Salmon, Tuna, Cod, Halibut… | 5 hidden sources | FDA FALCPA 2004 + FARE Fish Allergy Avoidance Guide | January 2024 |
| 🦐 Shellfish | Shrimp, Crab, Lobster, Clams… | 5 hidden sources | FDA FALCPA 2004 + FARE Shellfish Allergy Avoidance Guide | January 2024 |
| 🌰 Tree Nuts | Almonds, Walnuts, Cashews, Pecans… | 6 hidden sources | FDA FALCPA 2004 + FARE Tree Nut Allergy Avoidance Guide | January 2024 |
| 🥜 Peanuts | Peanut butter, Peanut oil, Boiled peanuts, Peanut brittle… | 5 hidden sources | FDA FALCPA 2004 + FARE Peanut Allergy Avoidance Guide | January 2024 |
| 🌾 Wheat | Bread, Pasta, Flour tortillas, Couscous… | 6 hidden sources | FDA FALCPA 2004 + FARE Wheat Allergy Avoidance Guide | January 2024 |
| 🫘 Soybeans | Soy milk, Tofu, Edamame, Soy sauce… | 6 hidden sources | FDA FALCPA 2004 + FARE Soy Allergy Avoidance Guide | January 2024 |
| ⚪ Sesame | Sesame seeds, Sesame oil, Tahini, Halva… | 6 hidden sources | FDA FASTER Act 2021 (effective Jan 1, 2023) + FARE Sesame Allergy Avoidance Guide | January 2024 |
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This reference covers FDA-recognized major allergens only. Severity and cross-contamination depend on individual reactivity and manufacturing practices — this tool intentionally does not predict them. Always confirm with the allergic person and their prescribed action plan.
FDA FALCPA 2004 identifies 8 major allergens. FASTER Act 2021 added sesame as the 9th, effective January 1, 2023.
Food Allergy Research & Education (FARE) publishes allergen-specific avoidance guides listing hidden and unexpected sources.
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