32 Million Americans, 9 Major Allergens
Approximately 32 million Americans have food allergies — including roughly 5.6 million children under 18. Food allergy reactions range from mild hives to life-threatening anaphylaxis. Navigating food labels safely is a daily medical necessity for these consumers, yet allergen labeling law contains gaps and ambiguities that regularly cause confusion and, in severe cases, contribute to serious reactions.
The Legal Foundation: FALCPA and the FASTER Act
FALCPA (2004)
The Food Allergen Labeling and Consumer Protection Act of 2004 established mandatory labeling for the "Big Eight" allergens:
- Milk
- Eggs
- Fish
- Shellfish (crustaceans)
- Tree nuts
- Peanuts
- Wheat
- Soybeans
FALCPA requires that allergens be declared either in the ingredient list by their common name ("contains milk") or in a separate "Contains" statement: "Contains: Milk, Soy."
FASTER Act (2023)
The Food Allergy Safety, Treatment, Education, and Research Act added a ninth major allergen: sesame. Full compliance was required by January 1, 2023. Sesame allergy affects approximately 1.6 million Americans and can cause anaphylaxis. Before the FASTER Act, sesame could appear on labels under terms like "tahini," "sesame oil," or "til" without a clear allergen statement.
The Nine Major Allergens: What They Mean in Ingredient Lists
| Allergen | Common Ingredient Names |
|---|---|
| Milk | Casein, caseinate, whey, lactalbumin, lactoglobulin, lactose, butter, cream, ghee, half-and-half, cheese, curds |
| Eggs | Albumin, globulin, lysozyme, mayonnaise, meringue, ovalbumin, ovomucin, ovovitellin |
| Fish | Must specify species: "Fish (salmon)," "Fish (cod)." Anchovies, bass, flounder, grouper, haddock, halibut, mahi-mahi, pollock, tilapia, trout, tuna |
| Shellfish (crustaceans) | Must specify species. Crab, crawfish/crayfish, lobster, prawns, shrimp. Note: Mollusks (clams, oysters, scallops, squid) are NOT covered by FALCPA |
| Tree nuts | Must specify type. Almonds, Brazil nuts, cashews, hazelnuts, macadamia, pecans, pine nuts, pistachios, walnuts. Coconut is technically a tree nut under FDA classification despite being a fruit biologically. |
| Peanuts | Arachis oil (some peanut-allergic individuals react to highly refined peanut oil; cold-pressed/expeller-pressed peanut oil retains allergenic protein; highly refined peanut oil generally does not) |
| Wheat | Flour, bread crumbs, bulgur, durum, emmer, farro, kamut, semolina, spelt, triticale, wheat bran, wheat germ, wheat starch |
| Soybeans | Edamame, miso, natto, soy sauce, tamari, tempeh, tofu, soy protein (isolate/concentrate), soybean oil (in some contexts) |
| Sesame | Gingelly oil, sesame flour, sesame paste, sesame salt, sesame seed, tahini, til, til oil |
The "May Contain" Problem
One of the most significant gaps in US allergen labeling law: advisory labeling is entirely voluntary and unregulated. Statements like "may contain," "processed in a facility with," "made on shared equipment with," and "not suitable for [allergen]-allergic individuals" are not required, not standardized, and not subject to FDA review or verification.
This creates several problems:
- A product that says "may contain tree nuts" could have negligible cross-contamination risk or substantial risk — the statement alone doesn't differentiate
- Products that don't carry an advisory statement may still have cross-contamination risk — some manufacturers simply don't use voluntary advisory labels
- The inconsistency means many allergic consumers either over-restrict (avoiding all advisory-labeled products unnecessarily) or under-restrict (assuming unlabeled products are safe)
Research shows that a significant percentage of unlabeled products (those without advisory statements) still test positive for allergen traces. A 2018 study found that approximately 7% of products without advisory statements contained detectable allergen levels that could trigger reactions in sensitive individuals.
What Is Not Covered — Significant Gaps
- Mollusks (clams, oysters, mussels, scallops, squid, octopus): Not covered by FALCPA despite being a significant allergen source for shellfish-allergic individuals
- Alpha-gal syndrome allergens: A tick-bite-induced allergy to mammalian meat (beef, pork, lamb) — not covered by current law
- Restaurant and foodservice: FALCPA applies to packaged food only. Restaurants have no federal mandatory allergen disclosure requirement, though some states have enacted their own laws. Several high-profile deaths have resulted from restaurant allergen failures.
- Fresh, unpackaged foods: Deli counter items, fresh bakery goods, and items sold without a label are typically exempt
How to Read Labels for Maximum Safety
- Read both the ingredient list AND the "Contains" statement — they can technically differ (though both must be accurate)
- Know the chemical/scientific names for your allergen (see table above)
- Evaluate advisory labels in context — "may contain" from a large manufacturer with dedicated allergen-free lines means something different than from a small facility that processes everything on shared equipment
- When in doubt, contact the manufacturer — most major brands have allergen hotlines
- For sesame: as of 2023, all products must explicitly declare sesame; check older inventory for unlabeled sesame ingredients
The Bottom Line
The FALCPA + FASTER Act framework covers the nine most common allergens comprehensively for packaged foods. The critical gaps are voluntary advisory labeling, restaurant meals, and unlabeled fresh foods. For severe food allergies, relying on "may contain" labeling as a safety indicator is unreliable — contact manufacturers and use dedicated allergen-free certified products where possible. Use our allergen ingredient database and comparison tool to track allergen presence across products in any category.