New Research: What UK Studies Reveal About the Link Between Food Labelling Reforms and Healthier Purchasing in Low-Income Households

# New Research: What UK Studies Reveal About the Link Between Food Labelling Reforms and Healthier Purchasing in Low-Income Households

Food labels seem mundane — a small rectangle of text most of us scan for about two seconds before dropping something in the basket. But a growing body of UK research suggests that how nutritional information is presented could have a measurable impact on what families actually buy, particularly in households where every pound counts.

Why Food Labelling Matters More Than You Might Think

It's easy to dismiss food labels as background noise. In practice, though, they represent one of the few moments in a shopping trip where nutritional information is directly in front of a consumer at the point of decision.

The UK has had a complicated relationship with food labelling reform. For years, campaigners, public health researchers, and supermarket chains have debated which system works best — traffic light labels, Nutri-Score, Reference Intake percentages, or something else entirely. What's become increasingly clear from recent research is that the format of a label isn't a neutral design choice. It shapes behaviour, and it doesn't shape everyone's behaviour equally.

For low-income households in particular, the stakes are higher. Tighter budgets mean less margin for experimentation, more reliance on value-range products, and often less time for extended label scrutiny in supermarket aisles. Any labelling system that works well for a well-nourished, time-rich shopper isn't necessarily going to work the same way for a parent doing a weekly shop on £60.

The Current Labelling Landscape in the UK

The UK currently uses a voluntary front-of-pack traffic light labelling system, rolled out with government backing from 2013 onwards. The system uses colour coding — red, amber, green — to signal at a glance whether a product is high, medium, or low in fat, saturated fat, sugar, and salt, alongside calorie information.

Voluntary is the key word there. Not all manufacturers use it, and those that do aren't required to follow a consistent format. Some brands display the full colour-coded breakdown; others show only calories or Reference Intake percentages without the colour cues that make the system intuitive.

Since Brexit, the UK has diverged from the EU, which has been actively considering mandatory Nutri-Score adoption across member states. The UK government has consulted on mandatory front-of-pack labelling but, as of writing, no binding legislation has been passed. That policy gap is precisely what researchers have been trying to fill with evidence.

What the Evidence Shows

A 2022 study published in the Journal of Epidemiology & Community Health, drawing on data from the UK Biobank and shopping behaviour surveys, found that participants from lower socioeconomic backgrounds were significantly less likely to use nutritional labels when making purchasing decisions — not because they didn't care about nutrition, but because labels were frequently confusing, inconsistent, or simply not present on the products they were buying.

Research from the Food Standards Agency (FSA) has consistently shown that the traffic light system, when applied consistently and prominently, does improve the ability of consumers across income groups to identify healthier options. Crucially, though, the FSA's own consumer research highlights that the benefit is strongest when the label is mandatory and standardised — inconsistent application dramatically reduces its usefulness.

A 2023 systematic review from researchers at University College London examined labelling interventions across 17 studies and found that interpretive labels — those that translate nutritional data into a simple verdict rather than asking consumers to do the maths — produced more consistent behaviour change across socioeconomic groups. Front-of-pack colour coding performed better than Reference Intake percentages alone, particularly among shoppers with lower nutritional literacy.

One counterargument worth taking seriously is that labelling reform, on its own, is a relatively weak lever. Food environments — what's available, what's affordable, what's promoted — matter enormously. A family for whom a red-labelled product is the only affordable option isn't going to switch simply because the label is clearer. Researchers increasingly frame labelling reform as a necessary but not sufficient condition for improving dietary outcomes in lower-income households.

The Specific Challenge for Low-Income Households

The intersection of food labelling and income isn't just about literacy. It's about the structural reality of value-range products, budget supermarkets, and own-brand lines — which are disproportionately where lower-income households shop and which have historically had the lowest rates of front-of-pack labelling compliance.

A 2021 report from the Food Foundation found that the healthiest diets cost roughly £6.22 per person per day in the UK, compared to £4.27 for the least healthy. That cost gap means labelling reform can't fix the affordability problem. But research does suggest it can influence choices within a given price bracket — helping families identify the better option among similarly priced products when the label is clear enough to be useful.

There's also the cognitive load argument. Researchers in behavioural economics point out that decision fatigue is a real phenomenon — the more decisions a person has to make under constraint, the more mental energy is depleted. A label that requires a shopper to mentally divide grams by Reference Intakes while managing a toddler and a budget is a labelling system that isn't doing its job. Simplified, interpretive formats reduce that burden, which is why researchers like Professor Susan Jebb at Oxford have long advocated for consistent, mandatory colour-coded labelling.

What Recent UK Policy Discussions Are Missing

One gap that keeps appearing in the research literature is the relative neglect of online grocery shopping in labelling policy discussions. As of 2024, a substantial portion of UK grocery shopping — and a growing share among lower-income households who use click-and-collect services — happens online, where product pages vary wildly in how nutritional information is presented.

Some supermarkets display full traffic light labels on their websites; others show only partial information or require shoppers to navigate to a separate nutrition tab. There's currently no regulatory framework specifically addressing online food labelling consistency, which researchers argue is an increasingly significant oversight.

Digital food environments also create new possibilities. Some researchers have proposed that online platforms could go further than physical labels ever could — surfacing nutritional comparisons, filtering by nutrient profile, or flagging products that meet specific dietary criteria. Whether that falls to supermarkets, government, or third-party apps remains an open question, but it's one that's gaining attention in public health circles.

What Reforming Labels Could Actually Change

It's worth being realistic here. Food labelling reform is not a silver bullet, and the research doesn't pretend it is. The studies that show positive behaviour change tend to find modest but meaningful effects — shifts of a few percentage points in the proportion of shoppers choosing lower-sugar or lower-salt options. At a population level, those shifts add up. At an individual level, they're unlikely to transform anyone's diet overnight.

What the evidence does support is this: when labels are standardised, mandatory, prominently placed, and interpretive rather than numerical, they are more likely to be used — and more likely to be useful — across all income groups. The current patchwork system, where labelling is voluntary and inconsistently applied, disproportionately disadvantages the shoppers who would benefit most from clear, accessible information.

The UK government's forthcoming consultation on mandatory front-of-pack labelling is an opportunity to act on that evidence. Whether it does remains to be seen.

Practical Takeaways for Your Own Shopping

While the policy catches up, there are a few things worth keeping in mind next time you're navigating a supermarket aisle.

Traffic light labels are your quickest tool. When they're present, a quick scan of the colour coding gives you a reasonable at-a-glance picture of a product's nutritional profile — particularly useful for fat, sugar, and salt.

Own-brand and value products often lack front-of-pack labels. For those, the back-of-pack nutrition table is your fallback. Focus on the "per 100g" column rather than the "per serving" column, which manufacturers can manipulate by setting unrealistically small portion sizes.

In online shopping, use filters where available. Some supermarket apps and websites allow you to filter by nutritional criteria — lower sugar, lower salt — which can replicate some of the work a good label does in-store.

Comparing per 100g figures across similar products is the most reliable way to make like-for-like comparisons, regardless of how the front-of-pack label is presented.

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