Food Allergen Labeling: FALCPA + FASTER Act + Top 9

Quick Answer

FDA requires plain-English disclosure of nine major food allergens on packaged food labels: milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, and sesame (added January 1, 2023 under the FASTER Act). Allergens must be declared either via parenthetical names in the ingredient list (e.g., "lecithin (soy)") OR via a separate "Contains:" statement immediately below or adjacent to the ingredient list. The original FALCPA (2004) covered the first eight; the FASTER Act of 2021 added sesame. "May contain" advisory labels are voluntary and not regulated — the FDA has explicitly cautioned against overuse because it dilutes meaningful disclosure.

Allergen labeling is one of the most strictly enforced areas of FDA food regulation — and the rules expanded significantly in January 2023 with the addition of sesame as the ninth major allergen. This guide covers everything required under FALCPA (2004) and the FASTER Act (2021), including how to declare allergens, the dangers of "may contain" labels, and what triggers FDA enforcement.

The Top 9 Major Food Allergens

Under FALCPA (Food Allergen Labeling and Consumer Protection Act of 2004) and the FASTER Act (Food Allergy Safety, Treatment, Education, and Research Act of 2021), the FDA designates nine foods as "major allergens" requiring mandatory disclosure on packaged food labels:

Milk — including all dairy derivatives (whey, casein, lactose, ghee)
Eggs — including egg-derived ingredients (albumin, lecithin from egg yolk)
Fish — must declare the species (e.g., tuna, salmon, cod)
Crustacean shellfish — shrimp, crab, lobster, crayfish
Tree nuts — must declare specific type (almond, walnut, pecan, cashew, pistachio, hazelnut, Brazil nut, macadamia, pine nut, etc.)
Peanuts — note: peanuts are legumes, but FALCPA treats them separately from soybeans
Wheat — including all wheat derivatives (gluten, semolina, durum, spelt)
Soybeans — including soy-derived ingredients (soy lecithin, hydrolyzed soy protein, tofu)
Sesame — added in January 2023 under the FASTER Act (the ninth allergen)

Two Approved Methods to Declare Allergens

The FDA allows two formats — and most manufacturers use both for redundancy.

Method 1: Parenthetical names in the ingredient list. When an allergen is present as a component of an ingredient, the allergen name appears in parentheses next to the ingredient. Example:

Ingredients: enriched flour, sugar, eggs, butter (milk), lecithin (soy), vanilla extract, salt.

Method 2: Separate "Contains:" statement. A bold "Contains" line below or adjacent to the ingredient list spells out every major allergen present. The font must be at least the same size as the ingredient list. Example:

Ingredients: enriched flour, sugar, eggs, butter, lecithin, vanilla extract, salt.
Contains: wheat, eggs, milk, soy.

The Sesame Addition (Effective January 2023)

The FASTER Act of 2021 made sesame the ninth major allergen, with mandatory compliance starting January 1, 2023. The addition came after years of advocacy — sesame allergy affects an estimated 1.5 million Americans, similar to peanut allergy. The implementation has had unintended consequences: some manufacturers, rather than reformulating to remove cross-contact sesame, have begun voluntarily adding small amounts of sesame flour to existing products to avoid the higher cost of separate production lines. This practice is legal but criticized by allergy advocacy groups.

"May Contain" Labels: Use With Caution

Voluntary advisory statements like "May contain peanuts" or "Processed in a facility that also processes wheat" are not regulated by the FDA. They\'re used to warn consumers about potential cross-contact during manufacturing. Two important considerations:

They\'re not a substitute for actual allergen disclosure. If an allergen is an intentional ingredient, you must declare it under FALCPA — "may contain" is not enough.
Overuse dilutes the warning. The FDA has expressed concern that products labeled "may contain" everything become useless to allergic consumers who learn to ignore the warnings. Use only when there\'s genuine cross-contact risk.

Best practice: Conduct a formal allergen risk assessment of your facility. If shared equipment creates cross-contact risk, document it, implement cleaning protocols, and use "may contain" only when truly necessary. Avoid blanket disclaimers added "just in case" — they raise more legal exposure than they prevent.

What Happens When Allergens Aren\'t Declared

Undeclared allergens are among the top causes of FDA recalls. Consequences typically include:

Mandatory recall — usually Class I (highest severity) because of the direct public health risk.
Warning Letter with corrective action plan demanded within 15-30 days.
Import detention for foreign manufacturers.
Class-action lawsuits — undeclared allergen cases are highly winnable for plaintiffs and routinely settle for hundreds of thousands to millions of dollars.
State enforcement in addition to federal action.

How NutriFacts Handles Allergens

Nutrition facts labels themselves don\'t carry allergen disclosure — allergens appear in the ingredient list and "Contains" statement, which sit separately on the package. Our free generator produces the FDA-compliant nutrition facts panel; you\'ll add the allergen disclosure separately as part of your full packaging design.

For a complete labeling checklist that includes both nutrition facts and allergen disclosure, see our FDA Requirements Guide. Small businesses qualifying for the nutrition exemption (covered in our exemption post) are still required to disclose allergens — the exemption only applies to the Nutrition Facts panel, not allergen rules.

Frequently Asked Questions

What are the Top 9 major food allergens?

Milk, eggs, fish, crustacean shellfish (shrimp, crab, lobster), tree nuts (almonds, walnuts, pecans, cashews, etc.), peanuts, wheat, soybeans, and sesame. The first eight have been required since FALCPA in 2004; sesame was added as the 9th allergen by the FASTER Act of 2021, with mandatory compliance starting January 1, 2023.

How must allergens be declared on a label?

Two FDA-approved methods. Method 1: include the allergen name in parentheses immediately after the ingredient (e.g., "whey (milk)" or "lecithin (soy)"). Method 2: include a separate "Contains:" statement in the same font size as the ingredient list, immediately below or adjacent (e.g., "Contains: milk, soy, wheat"). Many manufacturers use both for clarity.

Are "may contain" labels required by law?

No. "May contain" advisory statements are voluntary, not regulated. They're used by manufacturers to warn about potential cross-contact in shared facilities. The FDA has expressed concern that overuse of "may contain" labels reduces consumer trust and creates "label fatigue" — and is exploring whether to formalize advisory labeling rules.

Do I need to declare every type of tree nut?

Yes. The FDA requires the specific tree nut type to be declared — not just "tree nuts." If your product contains almonds, the label must say "almonds" specifically (e.g., "Contains: almonds, milk"). The same applies to fish (must name the species — "tuna," "salmon," etc.) and crustacean shellfish ("shrimp," "crab," etc.).

When did sesame become a required allergen?

January 1, 2023. The FASTER Act of 2021 added sesame as the ninth major food allergen, with a phased compliance window. As of January 2023, all packaged foods sold in the U.S. must declare sesame using the same rules as the other eight allergens.

What are the penalties for missing allergen declarations?

Missing allergen declarations are among the FDA's top enforcement priorities because of the direct public health risk. Consequences include mandatory recalls (often Class I — the most severe), Warning Letters, import detention, and civil penalties. Class-action lawsuits frequently follow allergen-related recalls. State health departments also actively investigate consumer complaints.

Do allergen rules apply to restaurants?

Federal allergen labeling laws (FALCPA, FASTER Act) apply to packaged food, not to restaurant meals served on-site. However, many states (including New York, Massachusetts, Illinois, and Virginia) require restaurants to train staff on allergens and provide allergen information upon request. Restaurants selling packaged retail products (jarred sauce, frozen meals) must comply with FDA packaged-food allergen rules for those products.

How do bulk-bin foods handle allergen labeling?

For foods sold from bulk bins at retail, the allergen disclosure must appear on the bin signage or on the consumer-facing label applied at point of sale. Retailers cannot rely on the manufacturer's allergen disclosure on the original shipping container — the consumer must see allergen information at the point of purchase.

Food Allergen Labeling: FALCPA, the FASTER Act, and the Top 9 Allergens