Allergen Compliance for Food Marketplace Sellers: Amazon, Etsy, and Your Own Store
Food sellers on Amazon, Etsy, and food marketplaces have the same allergen labelling obligations as retail brands. Here is what marketplace food sellers must do.
Selling food on Amazon, Etsy, or other online marketplaces does not change your allergen labelling obligations. The physical product must carry a compliant label, and your online product listing should also display accurate allergen information.
Platform Policies and Legal Requirements
Amazon and other food-enabled marketplaces have their own food listing policies that require allergen information in product listings. Compliance with platform policies and compliance with food law are separate obligations — satisfying one does not automatically satisfy the other.
Food law requires the physical label on the product to be compliant. Platform policy may additionally require allergen information in the product listing.
The Physical Label on Your Product
Regardless of where you sell — marketplace, own website, or physical retail — the product that reaches the customer must carry a label that complies with food information law. For UK sales, this means all 14 allergens declared in the ingredient list with emphasis. For US sales, FALCPA allergen declaration is required.
Your Online Listing
Your product listing on any platform should clearly display allergen information. This helps allergic consumers make safe purchasing decisions before ordering, reducing the risk of an adverse event and the associated return, complaint, or incident.
The Consistency Test
Check that allergen information on your product listing and on your physical label are consistent. A discrepancy — where the listing says "contains nuts" but the label does not, or vice versa — is a red flag.
Keep allergen information consistent across your Shopify store and product labels with Allergen Matrix — free to get started at saltai.app.
Managing Multiple Sales Channels Without Creating Gaps
Selling across several channels simultaneously — your own Shopify store, an Etsy shop, and an Amazon listing — means you are maintaining multiple versions of the same product information in different systems. Each platform has its own listing interface, its own fields, and its own update process. When you reformulate a product or switch a supplier ingredient, you need to update every single channel. Missing one channel creates a compliance gap that exposes customers to inaccurate allergen information and exposes your business to serious legal and reputational risk.
The practical challenge is that marketplaces do not communicate with each other or with your own website. There is no automatic synchronisation between your Amazon listing and your Etsy shop. Sellers who rely on memory or manual checklists to keep everything aligned will eventually make an error, particularly during busy trading periods when new orders are coming in and product development is ongoing at the same time. A structured approach to managing your allergen source of truth — ideally a single document or system that feeds all channels — is far more reliable than updating each platform independently.
One effective method is to maintain a master allergen record for each product that you update first whenever anything changes. Before you update any listing or reprint any label, the master record is updated and reviewed. Every channel is then updated from that single source. This approach does not require expensive software — a well-maintained spreadsheet can serve this purpose — but it does require discipline and a clear process that everyone involved in your food business understands and follows.
Understanding Precautionary Allergen Labelling Across Channels
Precautionary allergen labelling — statements such as "may contain traces of peanuts" or "made in a facility that also handles milk" — is a separate matter from the declaration of intentional allergens in your ingredient list. These statements reflect your manufacturing environment and cross-contamination risk. They are not a legal substitute for declaring allergens that are genuinely present as ingredients, and they should not be used to avoid declaring an allergen you know to be present. Understanding this distinction is important when you are writing product listings for any channel.
On marketplaces like Etsy, where many sellers produce food in home kitchens or small shared facilities, the risk of cross-contamination is often real and significant. Buyers with severe allergies may ask specific questions about your production environment before purchasing. Your answers need to be accurate and consistent with what is stated on your physical label. If your label carries a "may contain" statement for tree nuts because you handle walnuts in the same kitchen, your listing should reflect that same information so buyers can assess the risk before they order.
The wording of precautionary statements also matters. Vague language such as "allergen information available on request" is not acceptable in pre-packed food listings where allergen information should be immediately visible. Consumers should not have to send a message or make an enquiry to find out whether a product is safe for them. Clear, upfront disclosure — even when the information is cautionary — is both better practice and a stronger signal of trustworthiness to allergic shoppers who are highly attuned to how sellers communicate about allergens.
What Happens When You Update a Recipe or Switch Suppliers
Recipe changes and supplier switches are among the most common causes of allergen labelling errors in small food businesses. A seller may swap a chocolate supplier without realising that the new supplier's product contains soya lecithin where the previous one did not. The physical label gets reprinted to reflect the new ingredient, but the marketplace listings are not updated because the change feels minor. For a customer with a soya allergy, that omission is not minor at all.
Every time you make a change to a product — whether it is a full reformulation or a like-for-like ingredient substitution — the first step should be a fresh allergen review. Compare the allergen profile of the new recipe or ingredient against the previous one. If there is any difference, even the addition of a "may contain" risk that was not present before, every channel needs to be updated before you start selling products made with the new formulation. Selling old-label stock alongside new-formulation product creates confusion and potential harm.
Documenting ingredient changes is also valuable if you are ever questioned about your compliance. A simple log that records the date of a formulation change, what changed, what allergen impact it had, and which channels were updated gives you a clear audit trail. If a complaint or incident arises, being able to demonstrate that you have a disciplined process for managing changes is important evidence of due diligence. Buyers and enforcement bodies both respond better to sellers who can show they take this seriously than to those who cannot account for their own product history.
Responding to Allergen Queries From Marketplace Buyers
Marketplace buyers regularly contact sellers with allergen questions before placing an order. These queries deserve prompt, accurate responses — not because platform policies require it, though they often do, but because the person asking may have a life-threatening allergy and is relying on your answer to make a safe decision. A slow or vague response may push them toward a competitor, but an inaccurate response could cause genuine harm.
When you receive an allergen query, resist the temptation to answer from memory. Always verify against your current recipe and ingredient specifications before responding. This is particularly important if you have made any changes to the product recently, or if you produce multiple variants that differ slightly in composition. A confident but incorrect answer is far more dangerous than taking a few extra minutes to check your records and give an accurate one.
It is also good practice to keep a brief record of allergen queries and your responses, especially on platforms where message histories are preserved. This is useful if a dispute arises later. More importantly, if you notice that buyers are frequently asking the same allergen question about a particular product, that is a strong signal that your listing is not communicating allergen information clearly enough. Take it as an opportunity to improve the listing so that the information buyers need is visible before they need to ask.
Selling Across Borders: UK, EU, and US Allergen Rules
If you sell internationally through your own Shopify store or through marketplaces that serve multiple regions, you need to be aware that allergen regulations differ between jurisdictions. The UK follows retained EU food information law, requiring emphasis on 14 specified allergens within the ingredient list. The United States follows FALCPA, which requires declaration of nine major allergens and allows a separate "Contains" statement as an alternative to emphasis within the ingredient list. The EU's own rules align closely with the UK's but apply to sales into EU member states.
The most significant practical difference for small sellers is the allergen list itself. The US list of nine major allergens does not include mustard, lupin, sulphur dioxide, molluscs, or sesame at the federal level in the same way the UK and EU lists do — though sesame was added as a US major allergen from January 2023. A product labelled for UK sale may not meet US requirements without amendment, and vice versa. If you are shipping to customers in multiple countries, you need to ensure that both your physical label and your online listing are appropriate for the market you are selling into.
Running a single Shopify store that serves international customers adds further complexity. You may need region-specific product pages or at minimum a clear statement of which market your labelling is intended for. Seeking legal or regulatory advice for your specific product and target markets is recommended before you begin cross-border food sales, particularly if your products contain allergens that are regulated differently across jurisdictions. Getting this right from the start is considerably less costly than addressing a compliance failure after the fact.
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SaltAI Team
SaltAI builds focused Shopify apps for food merchants and general merchants. Every app is tested in production at a real food store — including Vanda's Kitchen — before it ships.