What Is FALCPA? A Guide for US Food Businesses Selling on Shopify

The Food Allergen Labeling and Consumer Protection Act (FALCPA), enacted in 2004, is the cornerstone of allergen labelling law in the United States. It requires that packaged food products sold in the US declare the presence of any of the major food allergens in plain, understandable language. For food businesses selling on Shopify in the American market, understanding FALCPA is not optional — it is a legal requirement.

What FALCPA Requires

Under FALCPA, food manufacturers must declare major allergens either in the ingredient list (using common names) or in a separate "Contains" statement immediately after the ingredient list. The law applies to all packaged food sold in the US, including imported products and foods sold through e-commerce channels like Shopify.

Which Allergens Must Be Declared

FALCPA originally identified eight major allergens: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybeans. In 2023, sesame was added as the ninth major allergen under the FASTER Act. Each of these must be explicitly declared on your product label and, for online sales, on your Shopify product pages before a customer completes a purchase.

FALCPA and Your Shopify Store

If you sell food through Shopify to US customers, FALCPA compliance extends beyond physical packaging to your digital storefront. The FDA's guidance on internet food sales requires that allergen information be available to consumers prior to purchase. Your product descriptions must clearly state which major allergens are present. Tools like SaltAI's Allergen Matrix app make this straightforward — adding standardised allergen badges to your Shopify product pages in minutes.

Explore SaltAI's allergen compliance tools at saltai.app/apps/allergen-matrix.

How FALCPA Applies to Small and Cottage Food Businesses

Many small food producers and cottage food businesses assume that FALCPA only applies to large manufacturers with established commercial operations. This is a common and potentially costly misconception. FALCPA applies to any packaged food product sold in the United States, regardless of the size of the business producing it. If you are making and selling food products through Shopify — even from a home kitchen — and shipping to US customers, you are within the scope of this legislation.

The exemptions that do exist under FALCPA are narrow and specific. Certain small businesses may qualify for modified labelling requirements in limited circumstances, but these do not remove the fundamental obligation to disclose allergen information. The safest and most commercially sensible approach is to treat every product listing on your Shopify store as subject to the full requirements of the law, ensuring that allergen declarations are accurate, visible, and consistently applied across your entire product catalogue.

For small businesses, the practical challenge is often one of resource and awareness rather than intention. Compliance tools designed for Shopify merchants remove much of the friction, allowing you to display standardised allergen information across multiple product pages without needing to manually update each listing. If you are scaling your US sales through Shopify, investing in a compliant allergen display system early saves significant rework later and demonstrates a professional standard of care to your customers.

The Difference Between "Contains" Statements and Ingredient List Declarations

FALCPA gives manufacturers two primary methods for declaring major allergens, and understanding the distinction between them is important for getting your labelling right. The first method is to include the allergen's common name within the ingredient list itself, either as the ingredient name or in parentheses immediately following the ingredient's technical or scientific name. For example, if an ingredient is listed as "casein," the label must also state "(milk)" in parentheses directly after it so that the allergen source is unmistakable to the consumer.

The second method is a separate "Contains" statement placed immediately after the ingredient list. This statement uses a straightforward format — "Contains: Milk, Wheat, Peanuts" — and must be complete and accurate. Crucially, if you choose to use a "Contains" statement, it must list every major allergen present in the product. A partial "Contains" statement that omits one allergen while listing others is not compliant and could expose your business to regulatory action. The FDA's position is that partial disclosure is worse than none because it creates a false sense of security.

For Shopify product pages serving US customers, both the physical label and the digital product description must reflect accurate allergen information. The format used on your packaging should be mirrored clearly in your online store. Inconsistency between your physical label and your digital listing is not just a compliance risk — it erodes consumer trust. Using a dedicated allergen display tool like Allergen Matrix ensures that the information presented to online shoppers is structured, standardised, and aligned with your physical labelling.

Cross-Contact and Advisory Labelling Under FALCPA

One area where food businesses frequently encounter confusion is the distinction between mandatory allergen declarations and voluntary advisory statements such as "May contain traces of peanuts" or "Manufactured in a facility that also processes tree nuts." FALCPA mandates the declaration of allergens that are intentional ingredients in a product. It does not require advisory or precautionary labelling for cross-contact risk, but it also does not prohibit it.

Cross-contact occurs when an allergen is unintentionally introduced into a product during manufacturing, storage, or handling. While FALCPA does not compel businesses to include advisory statements about cross-contact, the FDA has noted that such statements should only be used when there is a genuine, assessed risk of cross-contact. Using advisory statements broadly as a defensive measure — even when no real cross-contact risk exists — is considered misleading and inconsistent with the spirit of the law. US customers, particularly those managing serious allergies, have become increasingly critical of overused precautionary labels.

For Shopify merchants selling into the US, it is worth developing a clear internal policy on when and how cross-contact statements are used across your product range. If you produce multiple products in a shared facility and cross-contact is a real risk, document your processes and reflect that accurately in both your physical packaging and your online listings. Transparency about manufacturing conditions is increasingly expected by allergen-aware consumers and can become a genuine point of commercial differentiation when handled thoughtfully and consistently.

Enforcement, Recalls, and the Consequences of Non-Compliance

The FDA is responsible for enforcing FALCPA, and the consequences of non-compliance can be severe. Undeclared allergens are one of the most frequent causes of food recalls in the United States. When a product is found to contain an undeclared major allergen, the FDA may require a voluntary recall, issue a public warning, or take enforcement action against the manufacturer or distributor. Even for Shopify-based merchants operating primarily online, a recall is a significant operational and reputational event that can permanently damage customer relationships.

Beyond recalls, enforcement action can include warning letters, import alerts for products entering the US from overseas, and in serious cases, legal proceedings. The FDA conducts inspections and monitors marketplace listings, and e-commerce platforms are not outside its field of view. For UK or international merchants selling food into the US through Shopify, it is important to understand that FALCPA applies to your products the moment they are offered for sale to US consumers, regardless of where your business is incorporated or where you are based.

The most effective defence against enforcement action is straightforward: accurate, complete, and consistently presented allergen information. Keeping your product data up to date when formulations change, training anyone who manages your Shopify listings on allergen declaration requirements, and using purpose-built tools to maintain standardised displays across your store are all practical steps that reduce your risk profile considerably. Compliance is not a one-time exercise — it requires ongoing attention as your product range evolves.

Staying Current as Allergen Law Evolves

FALCPA has already been amended once since its original enactment, with the addition of sesame as the ninth major allergen under the FASTER Act in 2023. This change required food businesses to update both their physical packaging and their digital product listings to reflect the new requirement. It was a practical reminder that allergen law is not static, and that businesses must have systems in place that allow them to respond to regulatory changes efficiently and without disruption to their operations.

There is ongoing discussion within food science and regulatory communities about whether additional allergens should be recognised under US law. Mustard, lupin, and molluscs are among the allergens that receive formal recognition in other jurisdictions, such as the European Union and the United Kingdom, but are not currently covered by FALCPA. US food businesses selling across multiple markets need to be aware that different rules apply in different territories, and that a product listing compliant with FALCPA may not be sufficient for sales into European markets without additional declarations.

Keeping pace with these changes requires a proactive approach to compliance rather than a reactive one. Subscribing to FDA update notices, reviewing your allergen declarations when product formulations change, and ensuring your Shopify store has a flexible system for displaying allergen information are all part of operating a responsible food business in the current regulatory environment. Tools that integrate directly with your Shopify store make it significantly easier to update and maintain allergen data across your entire product catalogue as requirements evolve.

Try Allergen Matrix free at saltai.app — no credit card required.