Do you need lab testing for a UK nutrition label?

At the Food Service Industry Expo, a founder told me their brand had paid £4,000 for back-of-pack nutrition labelling on five SKUs (stock keeping units). That's £800 a product before a single unit has sold.

Founder-led brands ask me the same question all the time: do you need lab testing for a UK nutrition label? As of October 2026, you don't. UK law lets you calculate your nutrition label from your recipe. Lab analysis is one of three permitted methods, and it isn't the default. This post covers what the rules say, what a calculation needs to hold up, and the five situations where paying for lab testing is the better call.

What UK law says about calculating nutrition values

In Great Britain, the nutrition declaration on prepacked food falls under retained Regulation (EU) No 1169/2011, the Food Information to Consumers Regulation. Article 31(4) says the declared values must be average values based on one of three things:

1. the manufacturer's analysis of the food
2. a calculation from the known or actual average values of the ingredients used
3. a calculation from generally established and accepted data

The same three methods apply in Northern Ireland, where the EU regulation still applies directly.

The Food Standards Agency (FSA) Q&A on nutrition requirements says it plainly: the need for laboratory analysis depends on whether the recipe is followed accurately, how complex the production process is, and the nature of the ingredients.

Short answer: you don't need lab testing for a UK nutrition label. You can calculate the values from your recipe, as long as the result is an accurate average of the product you actually sell.

Most of the work is in that last condition.

How to calculate nutrition information from your recipe

You can't just add up the ingredients on the back of an envelope. A calculation that holds up when someone checks it has four parts.

Ingredient data. Every ingredient needs nutrient values. For branded or processed ingredients, the supplier's specification sheet is your best source, because it gives the "known or actual average values" the regulation refers to. For commodity ingredients like flour, butter or eggs, the UK reference is CoFID, the Composition of Foods Integrated Dataset published on GOV.UK. That counts as generally established and accepted data.

Production recipe weights. Use the quantities your production run actually puts in, not the version from the development kitchen. If your co-manufacturer rounds the oats up, your label should follow.

Yield and processing. Calculated labels go wrong here more than anywhere else. Baking drives off water, so the nutrients concentrate. If a cake batter loses 12% of its weight in the oven, the finished cake has more sugar per 100g than the batter did. Frying adds fat, and boiling pasta adds water. If your calculation ignores the change in weight between mix and finished product, every per 100g figure on the panel will be wrong.

Rounding. The final values follow the rounding rules in the EU guidance on tolerances. Energy, for example, is rounded to the nearest whole kJ and kcal.

Keep the working file for all four. It's your evidence if trading standards or a buyer ever questions a number.

How accurate a calculated label has to be

Enforcement officers judge accuracy against tolerances. The EU guidance on tolerances for nutrition labelling, which is still the reference document published on GOV.UK, sets how far a lab result can sit from your declared value. Two examples for foods other than supplements:

These tolerances already allow for measurement uncertainty, and they aren't a target to aim at. The guidance says the declared value must be the one that best represents what the food contains, so you can't deliberately set your number at the edge of the band.

In practice, a calculation built on good supplier data with yields included usually lands well inside these limits. A calculation that skips bake loss can fall outside them.

Five situations where lab testing is worth paying for

1. Your process changes the food in ways a calculation can't predict. Fermentation is the clearest case. In kombucha, the yeast and bacteria use up part of the added sugar, so the sugar you added tells you little about the sugar left in the bottle. Frying is similar, because fat uptake varies with time, temperature and coating. So does any drying or reduction step where moisture loss varies from batch to batch.

2. You're making a nutrition claim close to its threshold. Claims under Regulation (EC) No 1924/2006 have fixed conditions. "Low sugar" means no more than 5g per 100g for solids, or 2.5g per 100ml for liquids. "Source of fibre" means at least 3g per 100g. "High protein" means at least 20% of the product's energy comes from protein. If your calculation puts a bar at 4.8g of sugar against a 5g limit, a lab result is cheap insurance for the claim on the front of the pack.

3. Your HFSS score sits on a boundary. HFSS (high in fat, salt or sugar) status comes from the NPM (nutrient profiling model) score, and the model works in bands. If one nutrient sits just under a band edge, a small error in your data can move the product into HFSS scope. Our HFSS scoring walkthrough shows how a single band can be the difference between a product that can go on promotion and one that can't. The bands also move if the government applies the NPM 2018 update to HFSS rules.

4. Your ingredient data is weak or missing. Unusual ingredients often have no CoFID entry and only a thin supplier specification. Baobab powder, flour made from upcycled spent grain and specialist fibre fractions are typical examples. Fibre has a further catch, because the result depends on which analytical method produced it. We covered that in how fibre is treated on UK labels.

5. Your buyer asks for it. Some retail and foodservice buyers ask for a certificate of analysis as part of their technical specification. That's a commercial requirement, not a legal one. Check the buyer's spec before you sign off artwork, so you don't end up testing twice.

Testing doesn't have to mean testing everything. A common approach is to lab test one product to validate the calculation, then calculate the rest. If you sell five flavours of the same base bar, that could mean testing the base and calculating the variants, rather than paying for five full panels.

Do micro businesses need a nutrition label at all?

Some don't. Annex V, point 19 of Regulation 1169/2011 exempts food, including handcrafted food, that a manufacturer of small quantities supplies directly to the final consumer or to local retail establishments that supply the final consumer directly.

The FSA's guidance defines both terms:

• A manufacturer of small quantities is a micro business: fewer than 10 full-time equivalent employees, and a turnover or balance sheet total under €2 million.
• Local means within your own county, plus whichever is greater: the neighbouring county or counties, or 30 miles (50 kilometres) from your county's boundary.

The exemption ends as soon as you supply beyond that, for example through a national retailer or a wholesaler outside your area. It also doesn't cover a product that carries a nutrition or health claim, because making a claim triggers a nutrition declaration.

What this means for a food team

Start from calculation, not testing. Build the calculation on supplier specs and CoFID, include process yields, and record every input along with the recipe version it belongs to.

Recalculate whenever something changes. A new oat supplier can shift your fibre figure. A tweak to the bake profile can shift every value on the panel. When the calculation lives with the recipe, updating it takes minutes. When it lives in a one-off lab report, you're paying again.

Then spend your lab budget on purpose: on fermented or fried products, on claims and HFSS scores near a threshold, on ingredients without reliable data, and when a buyer asks. For a five-SKU range like the one at the Expo, that might be one or two tests, not five.

Frequently asked questions

Is lab testing a legal requirement for nutrition labels in the UK?

No. Article 31(4) of Regulation 1169/2011 allows nutrition values to be based on the manufacturer's analysis, on a calculation from the known or actual average values of the ingredients, or on a calculation from generally established and accepted data. All three are legal, provided the declared values are accurate averages.

Can I calculate my own nutrition label?

Yes. A food business can calculate its own nutrition declaration from its recipe, using ingredient data and allowing for weight changes during processing. You are responsible for the accuracy of the result, so keep the calculation and its sources on file.

Can I use supplier specification sheets to calculate my nutrition label?

Yes. Supplier specifications give the known average values of an ingredient, which is one of the bases the regulation allows. Keep copies, and recalculate when a supplier or specification changes.

What nutrition database can I use in the UK?

The Composition of Foods Integrated Dataset (CoFID), published on GOV.UK, is the standard UK reference for commodity ingredients. It counts as generally established and accepted data under Regulation 1169/2011.

How accurate does a calculated nutrition label have to be?

It must fall within the tolerances in the EU guidance on nutrition labelling tolerances, which the UK still uses. For sugars under 10g per 100g, a lab result can differ from the label by up to 2g. For salt under 1.25g per 100g, the margin is 0.375g. The declared value must be your best estimate of the true average, not a number set at the edge of the tolerance.

Do small food businesses need a nutrition label?

Micro businesses (fewer than 10 employees and under €2 million turnover) that supply small quantities directly to consumers, or to local shops that sell to consumers, are exempt under Annex V, point 19. The exemption doesn't apply once you sell beyond your local area, or if your product makes a nutrition or health claim.

When should I get my food lab tested?

Test when your process makes the numbers hard to predict (fermentation, frying, drying), when a claim or HFSS score sits close to a threshold, when you have no reliable data for an ingredient, or when a buyer asks for a certificate of analysis.

£800 a product buys a lot of certainty. Most of the time, a well-built calculation gives you the same certainty for much less, so save the lab budget for the cases where a calculation can't tell you enough.

Canoli calculates nutrition from your recipe, accounts for yields and scores your NPM at the same time, so you can see which products need a lab result before you book one. Get started free.