How FALCPA Applies to Shopify Food Stores Selling in the United States

Many food business owners assume allergen labelling law only applies to physical packaging. For US sales, FALCPA extends to the digital point of sale — which means your Shopify store is subject to the same allergen disclosure requirements as your product labels.

FDA Guidance on Internet Sales

The FDA's guidance documents for internet and mail-order food sales are clear: allergen information must be provided to consumers before they complete a purchase. This means your Shopify product pages must display allergen information prominently, not buried in a tab or attached as a downloadable PDF. A customer must be able to see allergen information without having to ask for it or navigate away from the product page.

What Your Shopify Product Pages Must Include

For every food product you sell to US customers through Shopify, the product page must state which of the nine major allergens are present. The most compliant approach is to mirror your physical label's "Contains" statement on the product page, and to display visual allergen badges for quick scanning. If a product may contain traces of an allergen due to shared equipment (cross-contact), this should also be disclosed — while not strictly required by FALCPA, omitting it creates liability.

Keeping Online and Physical Declarations in Sync

One of the most common compliance failures is a mismatch between the physical label and the online product page. When recipes change, businesses update the physical label but forget the Shopify product page — or vice versa. SaltAI's Allergen Matrix app keeps your Shopify allergen data centralised so a single update propagates across all products simultaneously.

Manage allergen compliance for your entire Shopify store in one place.

The Nine Major Allergens Covered by FALCPA

FALCPA currently requires food manufacturers and sellers to declare nine major food allergens: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. Sesame was added to the list under the FASTER Act and became enforceable from 1 January 2023, meaning any Shopify store that had compliant pages before that date may now have outdated declarations if sesame was overlooked during the update cycle. Each of these allergens must be declared using their common name — scientific names or trade names are not acceptable substitutes.

For tree nuts and fish, the specific variety must also be named. A declaration that simply reads "Contains: tree nuts" is insufficient under FALCPA if the product contains almonds — the label and your product page must read "Contains: almonds." This specificity requirement applies equally to your Shopify product descriptions, meaning a general statement about nut content buried in a paragraph of flavour copy will not satisfy the law. The declaration must be unambiguous and clearly positioned so that any reasonable consumer can identify it without interpretation.

Fish and shellfish carry an additional dimension because cross-contact between species can be particularly dangerous for highly sensitised individuals. If your kitchen or co-packer processes multiple varieties of fish or shellfish, your Shopify product pages should reflect this clearly in both the "Contains" statement and any precautionary cross-contact notice. Failing to distinguish between species — or failing to disclose cross-contact risk between species — can expose your business to both regulatory scrutiny and civil liability in the event of a serious allergic reaction.

How FALCPA Interacts With Shopify's Storefront Architecture

Shopify's default theme architecture presents specific compliance challenges that are worth understanding before you assume your product pages are fully covered. Many Shopify themes use accordion-style collapsible sections for product details, and allergen information is often placed inside one of these collapsed panels under headings such as "Ingredients" or "Nutritional Information." Because this information is hidden from view on page load, it does not meet the FDA's standard for prominent pre-purchase disclosure, even if the information itself is technically accurate.

The same concern applies to product descriptions that are truncated by a "Read more" toggle. If your allergen declaration appears below the fold of a collapsed description, a customer could add a product to their cart and proceed to checkout without ever having seen the relevant allergen information displayed on screen. This is not a theoretical risk — it is a structural feature of how many Shopify stores are built by default, and it is one of the most common gaps identified when food merchants audit their stores for US compliance purposes.

A practical solution is to use a dedicated allergen section that sits above the fold on every food product page, rendered as visible, expanded content without any click required to reveal it. Allergen Matrix is designed to inject this kind of standardised allergen block into your product pages automatically, using Shopify's app embed system so that the placement is consistent across your entire catalogue regardless of which theme you are using or how your product descriptions are structured.

Handling Product Variants With Different Allergen Profiles

Many Shopify food stores sell products with variants — different flavours, sizes, or formulations grouped under a single product listing. This creates a specific FALCPA compliance problem: if a vanilla variant contains milk and an allergen-free chocolate variant does not, the allergen disclosure on the shared product page must dynamically reflect whichever variant the customer has selected. Displaying a static allergen statement that covers the worst-case scenario across all variants might seem like a safe default, but it can confuse customers and may actually discourage sales of genuinely allergen-free options.

The correct approach is to ensure that your Shopify product pages update their allergen declarations in real time as a customer changes their selected variant. This requires either custom theme code or a purpose-built allergen management app that handles variant-level allergen data as a native feature. Without this functionality, you are either under-declaring allergens for some variants or over-declaring them for others — and neither outcome serves your customers or your compliance posture effectively.

Variant-level allergen management also becomes important during reformulations. If a supplier changes an ingredient in one SKU but not others, you need to be able to update the allergen data for that specific variant without inadvertently altering the declarations for every other variant in the product group. Centralised allergen management that operates at the variant level — rather than the product level — gives you the precision and control that growing food businesses genuinely need as their catalogues expand.

What Happens When You Sell Across Multiple Markets

Shopify Markets allows merchants to sell to customers in different countries from a single store, and many UK-based food businesses selling into the United States manage both markets through a single Shopify admin. This creates a compliance layering challenge: the UK requires declaration of the fourteen allergens listed under UK food law, while the US requires declaration of the nine allergens defined by FALCPA. Some allergens — such as celery, mustard, lupin, and molluscs — are required disclosures in the UK but are not major allergens under US federal law, whereas sesame is now a required US disclosure that only recently achieved the same status in the UK.

Managing this correctly means you cannot apply a single allergen template across your entire store and assume it satisfies both regulatory frameworks simultaneously. Your US-facing product pages need to be structured around FALCPA's nine allergens and the specific language requirements the FDA expects, while your UK-facing pages need to reflect the fourteen allergens required under UK retained food law. The overlap between the two lists is significant but imperfect, and the gaps matter — both legally and in terms of the trust you build with customers who have serious food allergies.

A multi-market allergen strategy should be built into your store architecture from the outset, rather than retrofitted after a compliance concern has been raised. Allergen Matrix supports market-aware allergen declarations, allowing you to define allergen profiles at the product and variant level and then surface the correct regulatory view depending on which market a customer is browsing from. This removes the manual overhead of maintaining separate product descriptions for each market while ensuring that each customer sees the disclosure that applies to their jurisdiction.

Documenting Your Compliance Process for US Regulators

FDA inspections of online food businesses are less common than physical facility inspections, but they do occur — and when they do, regulators expect to see evidence that your compliance process is systematic rather than incidental. Maintaining a record of when allergen declarations were reviewed, what changes were made, and which products were affected by those changes demonstrates that your business takes FALCPA obligations seriously. This kind of documentation can be the difference between a warning letter and a more serious enforcement action if a compliance gap is identified.

For Shopify merchants, this means keeping a log that connects your physical label revision history to your online product page update history. If your physical label is updated because a supplier changes an ingredient, you should be able to show that the corresponding Shopify product page was reviewed and updated within an appropriate timeframe. An audit trail does not need to be elaborate to be effective — a simple dated record of what was checked, what was changed, and who approved the update is often sufficient to demonstrate good faith compliance.

Building this documentation habit is significantly easier when your allergen data is managed through a centralised platform rather than edited manually in individual Shopify product descriptions. Centralised management creates an inherent record of changes, and it reduces the risk that an update is applied inconsistently across a large catalogue. The compliance burden for a Shopify food store operating in the US is real, but it is manageable when the right systems are in place from the beginning.

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