FDA & Compliance

Allergen Labeling Requirements for Supplements: FALCPA Guide

Food allergies affect approximately 32 million Americans, and allergic reactions to dietary supplements are more common than most brand founders realize. The FDA requires supplement labels to declare major food allergens under the Food Allergen Labeling and Consumer Protection Act (FALCPA) of 2004, updated by the FASTER Act of 2021. Non-compliance can result in mandatory recalls, warning letters, and serious liability if a consumer has an allergic reaction. Here is what every supplement brand needs to know.

The 9 Major Allergens

Under FALCPA and the FASTER Act, the following nine food allergens must be declared on supplement labels when present as an ingredient or as a component of an ingredient:

1. Milk — includes casein, whey, lactalbumin, and other milk-derived ingredients
2. Eggs — includes albumin, lysozyme, and other egg-derived proteins
3. Fish — must identify the specific species (e.g., cod, salmon, anchovy). Fish oil and fish-derived omega-3 supplements are common triggers.
4. Crustacean shellfish — must identify the specific species (e.g., shrimp, crab, lobster). Glucosamine from shellfish requires declaration.
5. Tree nuts — must identify the specific type (e.g., almonds, cashews, walnuts). Common in supplement capsules using tree-nut-derived oils.
6. Peanuts
7. Wheat — includes wheat grass extracts unless the protein has been fully removed
8. Soybeans — extremely common in supplements; soy lecithin is used as an emulsifier in many softgel capsules and powders
9. Sesame — added by the FASTER Act in 2023; includes sesame oil and sesame-derived ingredients

How to Declare Allergens on Supplement Labels

There are two FDA-acceptable formats for declaring allergens:

Option 1: "Contains" Statement

A separate "Contains" statement placed immediately after or adjacent to the ingredient list. Example: "Contains: Fish (anchovy), soy, milk." This must list the common name of each major allergen present in the product.

Option 2: Parenthetical Declaration

Identify the allergen source in parentheses after the ingredient name within the ingredient list. Example: "Lecithin (soy), Whey Protein Concentrate (milk)."

You may use both methods together. Many brands use parenthetical declarations within the ingredient list AND a separate "Contains" statement for maximum clarity. If you use a "Contains" statement, it must list ALL major allergens in the product — you cannot use it for some allergens and parenthetical for others.

Hidden Allergens in Supplement Ingredients

Many supplement ingredients contain allergens that are not obvious from the ingredient name alone. Watch for:

• Softgel capsules: Many use soy lecithin as an emulsifier and gelatin derived from fish
• Vitamin E (tocopherols): Often derived from soy
• Omega-3 fatty acids: Almost always derived from fish (even when marketed as "omega-3" without specifying the source)
• Glucosamine: Commonly derived from crustacean shellfish (crab, shrimp shells)
• Whey protein and casein: Milk-derived, present in many protein supplements
• Certain probiotics: May be cultured on milk-based media
• Natural flavors: Can contain allergen-derived components
• Stearic acid and magnesium stearate: Can be derived from soy or other plant sources, though these are highly refined and generally considered non-allergenic. Best practice is to verify the source with your manufacturer.

Cross-Contact and Precautionary Allergen Labeling

Cross-contact occurs when allergens are unintentionally introduced during manufacturing — for example, when the same equipment is used to produce both a fish oil supplement and a plant-based omega product. FALCPA does not require precautionary labeling (statements like "May contain traces of..." or "Manufactured in a facility that also processes..."), but the FDA expects manufacturers to use cGMP to minimize cross-contact risks.

If cross-contact risk exists and cannot be fully eliminated through cleaning and testing, precautionary labeling is strongly recommended from a liability standpoint. Use factual language: "Manufactured in a facility that also processes [allergen]." Avoid vague statements like "May contain" without specifying the allergen.

When selecting a contract manufacturer, ask about their allergen control program, dedicated equipment, cleaning validation between production runs, and allergen testing protocols.

International Considerations

If you plan to sell internationally, allergen labeling requirements vary by market:

• EU: Requires declaration of 14 allergens (the U.S. nine plus celery, mustard, lupin, mollusks, and sulfites)
• Canada: Lists 11 priority allergens including mustard and sulfites
• Australia/New Zealand: Includes lupin and sulfites in their mandatory declaration list

Design your labels to accommodate the most comprehensive allergen declaration you might need, rather than creating separate labels for each market.

Consequences of Non-Compliance

Undeclared allergens are the number-one reason for FDA-mandated product recalls in the food and supplement industry. A recall means pulling all affected product from shelves and online channels, issuing public notices, and potentially facing class-action lawsuits if consumers were harmed. Beyond the immediate financial impact, a recall for undeclared allergens signals a fundamental quality control failure that can permanently damage brand trust.

How CoreXponent Ensures Allergen Compliance

CoreXponent reviews every ingredient in your formula for allergen content, works with our manufacturing partner Well Aliments to implement cross-contact controls, and designs labels that meet FALCPA and FASTER Act requirements. Allergen compliance is built into our process — not an afterthought.