What Is a Major Food Allergen? (FDA Guidelines)
The nine major allergens, what counts (and what doesn't), and the coconut, shellfish, and sesame details that trip up food labels.
Key Takeaways
- Nine major allergens — milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soy, sesame.
- Sesame is the 9th — FASTER Act, effective January 1, 2023 (FALCPA 2004 set the first 8).
- Only crustacean shellfish — molluscs (oysters, clams, mussels, scallops) aren't major allergens.
- Name the specific tree nut / fish / crustacean — not just the category.
- Coconut is no longer a major-allergen tree nut — per FDA's 2025 guidance.
- Over-declaring is a violation too — declare exactly what's present.
The Nine Major Food Allergens
| Major allergen | Notes |
|---|---|
| Milk | Declare the food source (e.g., "casein (milk)") |
| Eggs | — |
| Fish | Name the species (e.g., cod, bass, flounder) |
| Crustacean shellfish | Name the species (crab, lobster, shrimp) — not molluscs |
| Tree nuts | Name the specific nut (almond, walnut, pecan…) |
| Peanuts | — |
| Wheat | — |
| Soybeans | "Soy" acceptable as the source name |
| Sesame | The 9th — FASTER Act, effective Jan 1, 2023 |
Where the List Trips People Up
- Only crustacean shellfish — crab, lobster, shrimp are major allergens; molluscan shellfish (oysters, clams, mussels, scallops) are not, even though "shellfish" colloquially covers both
- Name the specific species/type — "cod" not "fish," "shrimp" not "shellfish," "walnuts" not "tree nuts"
- Coconut is no longer a major-allergen tree nut — FDA's January 2025 final allergen guidance (Edition 5) narrowed the tree-nut list; coconut, if used, is declared by common name but not as a major allergen
- The current tree-nut list — almond, Brazil nut, cashew, filbert/hazelnut, macadamia (bush) nut, pecan, pine nut (pinon), pistachio, walnut
Sesame — the 9th Major Allergen
The FASTER Act (signed 2021) added sesame as the ninth major food allergen, effective January 1, 2023, amending FD&C §201(qq). Sesame now carries the same obligations as the others — labeling disclosure, allergen preventive controls, and cGMP allergen management. Before 2023 it could hide under "spices" or "natural flavors"; now it must be declared when present.
What the Rules Cover (and Don't)
- FDA-regulated packaged foods — including dietary supplements — are covered by FALCPA/FASTER
- Meat, poultry, and egg products = USDA/FSIS — regulated under separate laws, not FALCPA
- Raw agricultural commodities (fresh produce) are generally not covered
- Cross-contact "may contain" statements are voluntary — FALCPA mandates declaration of intentional allergens, not precautionary warnings; managing cross-contact is a food-safety-plan obligation, not a label shortcut
- Narrow exemptions exist — via FALCPA petition/notification (e.g., certain highly refined oils); you can't self-exempt
Allergens Are High-Stakes on a Label
Undeclared allergens are one of the leading causes of FDA food recalls, and inaccurate declarations — whether they omit a real allergen or add one that isn't there — can lead to recalls, warning letters, and import refusals, plus the serious safety risk to allergic consumers. FDA inspects and samples for correct allergen labeling and for cross-contact controls.
Review My Food Allergen Labeling
FDA Registration Assistance reviews your formulation and label to confirm the major allergens present are correctly identified and declared (by food source name, with the specific fish/shellfish/tree nut named), that you're not over- or under-declaring, and that the declaration is complete and consistent — against the current nine-allergen list and FDA's latest guidance (including the coconut/tree-nut update). We handle this as part of FDA food label review.
Contact us at info@fdaregistrationassistance.com or call +1 (928) 275-8333 for a quote. An independent compliance firm serving 1,000+ companies across 135+ countries, with 15+ years of experience.
Frequently Asked Questions — Major Food Allergens
1. What is a major food allergen?
A major food allergen is a specific legal category defined in the Federal Food, Drug, and Cosmetic Act - currently nine foods (and their protein derivatives) responsible for over 90% of food allergies in the U.S. They are milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. Because they're defined by statute, FDA-regulated packaged foods must declare these allergens clearly on the label. Being a "major food allergen" triggers specific labeling and allergen-control obligations.
2. What are the nine major food allergens?
Milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. The first eight were established by the Food Allergen Labeling and Consumer Protection Act (FALCPA) of 2004; sesame was added by the FASTER Act, effective January 1, 2023, making nine. You may still see older packaging referring to the "Big 8" - foods packaged before 2023 weren't required to be relabeled - but the current list is nine.
3. When was sesame added, and why does it matter?
Sesame became the ninth major food allergen under the FASTER Act, effective January 1, 2023 (it amended section 201(qq) of the FD&C Act). That means sesame is now subject to the same requirements as the other allergens: labeling disclosure, allergen preventive controls, and cGMP allergen management. Before 2023, sesame could sometimes hide under general terms like "spices" or "natural flavors" - now it must be declared as a major allergen when present.
4. Is coconut a major food allergen (tree nut)?
No longer. FDA historically treated coconut as a tree nut for allergen-labeling purposes, but its updated guidance (the January 2025 final allergen Q&A, Edition 5) narrowed the tree-nut major-allergen list, and coconut is no longer included as a major-allergen tree nut. If you used to declare coconut as a tree nut allergen "to be safe," review your label against the current list. Coconut, if used, is still declared by its common name in the ingredient list - just not as a major allergen.
5. Which tree nuts count as major allergens?
FDA's current major-allergen tree-nut list is: almond, Brazil nut, cashew, filbert/hazelnut, macadamia (bush) nut, pecan, pine nut (pinon), pistachio, and walnut. The updated guidance narrowed the list to those with evidence of allergenicity - so some items formerly treated as allergen tree nuts (including coconut) are no longer on it. When a major-allergen tree nut is present, you name the specific nut (e.g., "almonds"), not just "tree nuts."
6. Is all shellfish a major allergen?
No - only crustacean shellfish (such as crab, lobster, and shrimp) are major food allergens. Molluscan shellfish - oysters, clams, mussels, and scallops - are NOT major allergens under the FDA list. This trips people up because "shellfish" colloquially covers both. So a mollusk-only product isn't declaring a "major allergen" for the mollusk (though it's still declared as an ingredient), while any crustacean is a major allergen and the specific species should be named.
7. Do I have to name the specific fish, nut, or shellfish?
Yes. For fish, crustacean shellfish, and tree nuts, the specific species/type must be identified - for example "cod" (not just "fish"), "shrimp" (not just "shellfish"), "walnuts" (not just "tree nuts"). For the other allergens, the food source name is used (e.g., "milk," "egg," "wheat," "soy," "sesame"). Naming the general category alone for fish/shellfish/tree nuts is not sufficient.
8. How are major allergens declared on a label?
Each major allergen's food source must be identified either (1) in the ingredient list - by including the food source name where it isn't already obvious (e.g., "lecithin (soy)," "casein (milk)") - or (2) in a separate "Contains" statement immediately after or adjacent to the ingredient list (e.g., "Contains: Milk, Wheat, Soy"). You don't have to use both, but the declaration must be complete and consistent. See our allergen labeling requirements page for the how-to detail.
9. What products do these rules apply to?
FALCPA and the FASTER Act apply to FDA-regulated packaged foods (including dietary supplements). FDA regulates essentially all foods except meat, poultry, and egg products, which are regulated by USDA/FSIS under separate laws. Raw agricultural commodities (like fresh produce) are generally not covered. So the "major food allergen" framework here is specifically for FDA-regulated packaged foods - a USDA-regulated meat product follows FSIS rules instead.
10. Does the law require "may contain" cross-contact warnings?
No. FALCPA's mandatory labeling covers allergens that are intentionally part of the food. It does not require, or define, precautionary "may contain" or "made in a facility with" statements for unintentional cross-contact. Those advisory statements are voluntary, must be truthful and not misleading, and don't substitute for allergen preventive controls. Managing cross-contact in manufacturing (through your food safety plan) is the real obligation; a "may contain" label is not a shortcut.
11. Can I over-declare allergens "to be safe"?
No - over-declaring is also a violation. Listing an allergen in your ingredient list or "Contains" statement when it isn't actually in the formulation is an inaccurate declaration, and FDA treats inaccurate declarations - whether they omit a real allergen or add one that isn't present - as an enforcement issue. In 2024, FDA warned a bakery for listing sesame and certain tree nuts that weren't in the products. Declare exactly what's there - no more, no less.
12. Why did some companies start adding sesame after 2023?
After sesame became a major allergen, some manufacturers (notably some bakeries) found it cheaper to intentionally add sesame to products - and declare it - than to implement the cross-contact controls needed to keep sesame out of products that shouldn't contain it. This drew criticism from FDA and allergy advocates, because it reduces safe options for sesame-allergic consumers. It's legal to add and declare sesame, but it's the opposite of the law's intent, and note that falsely declaring sesame that isn't present is a violation.
13. Are there exemptions from allergen declaration?
There are narrow exemption mechanisms - FALCPA provides petition and notification processes by which a specific ingredient derived from a major allergen may be exempted if it doesn't cause an allergic response (e.g., certain highly refined oils are treated specially). But these are limited and specific; you can't self-exempt. Unless a recognized exemption clearly applies, treat any ingredient derived from a major allergen as requiring declaration. When in doubt, declare and confirm the ingredient's status.
14. What happens if my allergen labeling is wrong?
Undeclared allergens are one of the leading causes of FDA food recalls, and inaccurate declarations (missing or over-stated) can lead to recalls, warning letters, and import refusals - plus the serious safety risk to allergic consumers. FDA inspects and samples for correct allergen labeling and for cross-contact controls. Getting the allergen list, the food-source naming, and the declaration right is one of the highest-stakes parts of food labeling.
15. Do dietary supplements follow the same allergen rules?
Yes. Dietary supplements are regulated as a category of food, so the major food allergen requirements apply - a supplement must declare any of the nine major allergens present, by food source name, in the ingredient/Supplement Facts context or a "Contains" statement. Common supplement ingredients can carry allergens (e.g., soy lecithin, milk-derived ingredients, fish oil, wheat-derived excipients), so supplement labels need the same allergen review as food labels.
16. How does FDA Registration Assistance help with allergens?
We review your formulation and label to confirm the major allergens present are correctly identified and declared (by food source name, with the specific fish/shellfish/tree nut named), that you're not over- or under-declaring, and that the declaration is complete and consistent with the ingredient list - against the current nine-allergen list and FDA's latest guidance (including the coconut/tree-nut update). We handle this as part of FDA food label review. We're an independent compliance firm serving 1,000+ companies across 135+ countries with 15+ years of experience. Contact info@fdaregistrationassistance.com or +1 (928) 275-8333.
