NYC Allergen Law vs Natasha's Law: How They Compare

If you run a food business that sells in both the United States and the United Kingdom — or you're simply trying to understand which rules apply to you — allergen labelling law can feel like a maze. Two of the most talked-about pieces of legislation in the food industry right now are New York City's allergen disclosure requirements and the UK's Natasha's Law, which came into full effect in October 2021. Both exist to protect consumers with life-threatening food allergies, but they approach the problem very differently, and confusing one with the other can leave your business exposed to legal risk.

The stakes are high on both sides of the Atlantic. In the US, the Food Allergy Research and Education organisation estimates that 32 million Americans live with food allergies, with roughly 200,000 emergency room visits annually linked to allergic reactions. In the UK, Natasha's Law was passed directly in response to the death of Natasha Ednan-Laperouse, a 15-year-old who died after eating a Pret A Manger baguette that contained undeclared sesame. These are not abstract regulatory exercises — they reflect real, preventable tragedies.

In this post, you will learn the core differences between NYC allergen law and Natasha's Law, how each one applies to your labelling obligations, and what practical steps you should be taking if you sell food products online through Shopify.

What Is NYC Allergen Law?

New York City allergen law refers primarily to the requirements established under the New York City Health Code, which mandates that food service establishments — including restaurants, cafés, delis, and catering operations — disclose allergen information to customers upon request. Unlike Natasha's Law, NYC regulations do not generally require printed allergen labels on every individual pre-packaged item sold on-site; the obligation is focused on trained staff being able to communicate allergen content clearly and accurately. Food establishments must post a notice informing customers that they can request allergen information, and that notice must be clearly visible.

NYC law specifically addresses the Big Nine allergens as defined by the US Food Allergy Safety, Treatment, Education, and Research (FASTER) Act of 2021: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. Sesame was added as the ninth major allergen in January 2023, bringing the US list into closer alignment with international standards. Food businesses operating in NYC are also required to ensure that at least one Food Protection Certificate holder is on duty whenever food is being prepared and served, and allergen training is part of the NYC Food Handler certification curriculum.

For Shopify merchants selling food products to New York consumers online, the picture becomes more nuanced. If you are shipping pre-packaged goods, federal FDA labelling rules primarily govern your obligations, but if you operate a physical location in NYC alongside your ecommerce store, local health code requirements apply to that premises. Understanding where your obligations begin and end — federal versus local — is one of the most common points of confusion for multi-channel food businesses.

What Is Natasha's Law?

Natasha's Law is the informal name for amendments to the UK Food Information Regulations introduced through the Food Information (Amendment) (England) Regulations 2019, with equivalent legislation in Scotland, Wales, and Northern Ireland. It came into force on 1 October 2021 and applies specifically to food prepacked for direct sale (PPDS) — meaning food that is packaged on the same premises where it is sold, before a customer orders it. Classic examples include sandwiches assembled and wrapped in a café, bakery items placed in labelled bags, and salads portioned and sealed at a deli counter.

Under Natasha's Law, all PPDS food must carry a full ingredients list on the packaging, with the 14 major allergens required by EU-derived UK law clearly emphasised — typically through bold text, capitalisation, or a different font. These 14 allergens are: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, nuts, peanuts, sesame seeds, soybeans, and sulphur dioxide/sulphites above 10mg/kg. This is a broader list than the US Big Nine, which is an important distinction for any business operating in both markets.

Before Natasha's Law, PPDS food only needed to display the product name and a "may contain" advisory in some cases — a gap that proved fatal in Natasha Ednan-Laperouse's case. The 2021 legislation closed that gap entirely, and enforcement is handled by local authority Trading Standards officers. Non-compliance can result in improvement notices, fines, and in serious cases, prosecution. For UK-based Shopify merchants selling PPDS products, full compliance is non-negotiable.

Key Legal Differences Between the Two Frameworks

The most fundamental difference between these two frameworks is scope. Natasha's Law is specifically about physical labelling on PPDS food — it mandates what must appear on the package itself. NYC allergen law, by contrast, is more broadly focused on the food service environment and the communication of allergen information through staff and posted notices rather than requiring a label on every item. This distinction matters enormously for how you structure your compliance processes.

Another critical difference is the allergen lists themselves. The UK's 14 declared allergens include celery, mustard, lupin, molluscs, sulphites, and cereals containing gluten as distinct categories, none of which appear in the US Big Nine. Meanwhile, the US specifically calls out sesame as of January 2023, which had only recently been added to the UK list in Annex II of assimilated EU law. If you manufacture a product containing celery seed extract and sell it in both markets, UK law requires you to declare it prominently; US federal law does not currently require the same declaration.

The enforcement model also differs. In the UK, Trading Standards officers can conduct unannounced inspections of food premises and product labels, and repeat violations can escalate quickly. In New York City, the Department of Health and Mental Hygiene conducts routine restaurant inspections where allergen compliance is one of many factors assessed. For online Shopify sellers, this means UK-based operators face more immediate and direct risk of product-level non-compliance than their NYC counterparts, but that does not mean US sellers can afford to be complacent — especially as class action litigation related to misleading food labelling continues to grow in the US.

How Shopify Sellers Should Approach Compliance

If you sell food products through a Shopify store, your first step is to map your products against the allergen frameworks that apply to each market you serve. This sounds straightforward but quickly becomes complex when you have dozens of SKUs, custom recipes, or third-party manufactured products with incomplete specifications. A structured allergen matrix — a grid that maps every ingredient in every product against every regulated allergen — is the foundation of compliant food labelling and the most practical tool available to multi-product food businesses.

For UK sellers, every PPDS product page and physical label must reflect the current ingredients list with allergens emphasised as required by Natasha's Law. If you update a recipe — even a minor reformulation — your labels must be reviewed and updated before the product ships. For NYC-adjacent or US-based sellers, your product pages should clearly disclose the Big Nine allergens, and if you operate a physical space, staff training documentation should be kept on file. Many Shopify merchants find it useful to display allergen information in a consistent format across all product pages, both for legal compliance and customer trust.

Tools like Allergen Matrix can help you manage this across your entire Shopify catalogue systematically, reducing the manual effort involved in keeping allergen data accurate and audit-ready. Automating allergen disclosure also reduces the risk of human error — one of the leading causes of allergen-related incidents in food businesses of all sizes.

What Happens When You Operate in Both Markets?

Operating in both the UK and US markets simultaneously means you are subject to two distinct legal frameworks with different allergen lists, different labelling requirements, and different enforcement mechanisms. The safest approach is to build your labelling standards around the more demanding of the two at any given product level. In most cases, this means UK standards — particularly the requirement to emphasise all 14 allergens on PPDS products — will serve as your higher watermark.

Some global food brands take a unified approach, applying the broadest possible allergen declarations across all markets to simplify their compliance process and reduce the risk of geography-specific errors. For a growing Shopify merchant, this approach has real merit: it means your product data only needs to be managed in one place, and your customer-facing information is consistent regardless of where the order ships. It also signals genuine commitment to food safety, which builds trust with the growing number of allergy-aware consumers actively seeking brands they can rely on.

That said, there are situations where market-specific labelling is legally required regardless of your preferred approach — for example, certain FDA-mandated statements on US labels have no UK equivalent, and vice versa. Working with a qualified food safety consultant alongside software tools ensures you remain compliant at a granular level. Documentation is everything: if a regulator or a claimant ever questions your process, a clear audit trail of your allergen management decisions is your most important asset.

Conclusion

NYC allergen law and Natasha's Law share the same underlying goal — protecting people with food allergies from preventable harm — but they differ significantly in scope, the allergens they cover, and the labelling obligations they impose. NYC law focuses on food service communication and staff training, while Natasha's Law requires physical ingredient labels on all PPDS food with allergens clearly emphasised. The UK covers 14 allergens; the US covers nine. For Shopify food merchants operating in either or both markets, understanding these distinctions is not optional.

The practical takeaway is simple: build your allergen management processes around structured data, keep your product information updated every time a recipe changes, and use tools designed for food businesses to stay audit-ready. Compliance is not a one-time task — it is an ongoing operational commitment.

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