Malo hates shopping with me now. You spend ages scanning and he can never have what he wants.
In the fluorescent aisles of modern supermarkets, a quiet negotiation is underway between human appetite and algorithmic judgment. Yuka, a French app now carried by 85 million users across twelve countries, translates the chemistry of packaged food into a simple color — and in doing so, has moved manufacturers to reformulate thousands of products. Yet this new transparency, like so many tools of the information age, tends to illuminate the path most clearly for those already standing in the light.
- A single barcode scan can now override years of brand loyalty — 94% of Yuka users abandon a product the moment it flashes red, creating a consumer force powerful enough to reshape factory recipes.
- Intermarché, France's third-largest supermarket chain, has quietly overhauled more than 3,000 products and stripped out 160 additives since 2017, a supply-chain tremor triggered not by regulation but by an app.
- The tension between private profit and public health simmers beneath the surface — Yuka's CEO insists no brand has ever paid to influence a rating, but the app's reach remains concentrated among the affluent and digitally fluent.
- Food researchers warn that the populations most harmed by poor nutrition are precisely those least likely to be scanning barcodes in the aisle, meaning the transparency revolution may be widening the very gap it appears to close.
Nathalie stands in a supermarket west of Paris, scanning her son's favorite biscuit. The app returns a score of zero and a list of additives. Her twelve-year-old has stopped coming shopping with her — every trip is now a negotiation between desire and the algorithm's verdict.
The app is Yuka, launched in France in 2015 and now used by 85 million people across twelve countries. Its logic is disarmingly simple: scan a barcode, receive a color. Green means healthy, red means problematic, and a database of six million products — growing by 1,200 entries a day — supplies the verdict. The United States leads with 28 million users, and the app has expanded beyond food into cosmetics, making it a constant companion to everyday consumption.
Yuka sits within a broader French tradition of food transparency. The nonprofit Open Food Facts, launched in 2012, built the crowdsourced foundation many such apps rely on. The government's Nutri-Score label, designed by a Sorbonne researcher as a single letter grade, followed in 2018. Where Nutri-Score stops, Yuka continues — probing additives and ultra-processing that official labeling leaves unexamined.
The commercial consequences have been real. Intermarché has reformulated over 3,000 products and removed 160 additives since 2017, and in April 2026 began displaying Yuka scores directly on its online platform. CEO Julie Chapon, now based in the United States, credits the app's American growth to the scale of the problem the US food system presents — and insists revenue comes from subscriptions alone, never from brands seeking favorable ratings.
But the revolution has limits. Food policy researchers note that most people shop by habit, not by algorithm. Serge Hercberg, who designed Nutri-Score, puts it plainly: these tools reach the more privileged section of the population — not those most at risk from poor diet. The app has changed what gets made and what gets purchased, but only among those already inclined and equipped to engage. For everyone else, the supermarket aisle remains largely unchanged.
Nathalie stands in the biscuit aisle of a Hyper U supermarket west of Paris, holding her son's favorite snack in one hand and her smartphone in the other. She scans the barcode. The app flashes red—0/100—and lists the culprits: sugar, saturated fat, four additives including E450, a mineral that in excess can damage bone marrow and kidneys. She sighs. Her twelve-year-old has stopped enjoying shopping with her altogether. Every trip becomes a negotiation between what he wants and what the algorithm permits.
Nathalie uses Yuka, a French app that has quietly become one of the world's most influential tools for reshaping what people buy. Since its launch in 2015, Yuka has grown to 85 million users across twelve countries. The app works simply: point your phone at any barcode, and it assigns a color-coded score—green for healthy, red for problematic, yellow for middling—drawing from a database of six million products that expands by roughly 1,200 entries daily. The US dominates the user base with 28 million accounts, followed by France with six million and the UK with five million. The app's reach extends beyond groceries into cosmetics and toiletries, making it a companion to everyday consumption.
Yuka's success reflects a broader French innovation in food transparency. In 2012, programmer Stéphane Gigandet launched Open Food Facts, a crowdsourced, nonprofit database now covering four million products worldwide. Three years after Yuka's founding, the French government introduced Nutri-Score, a voluntary front-of-pack label created by food researcher Serge Hercberg at the Sorbonne. Hercberg designed it as a simpler alternative to the UK's traffic-light system—a single letter grade rather than multiple colored indicators. While major manufacturers like Danone and Nestlé have adopted Nutri-Score widely, others opt out when their products would score poorly. Apps like Yuka and Open Food Facts fill that gap, drilling deeper into additives and ultra-processing that the government label leaves unexamined.
The impact on purchasing behavior is measurable and significant. A 2024 Yuka survey of 20,000 users found that 94 percent put products back on the shelf when shown a red rating. This consumer pressure has rippled through the supply chain. Intermarché, France's third-largest supermarket chain with over 2,100 stores, has reformulated more than 3,000 products since 2017 and removed 160 additives in response to Yuka scores. Last year alone, the company reworked around 300 product formulations. In April 2026, Intermarché began displaying Yuka scores on its online shopping platform, embedding the app's logic directly into its retail infrastructure.
Yet the benefits of this transparency are not evenly distributed. Christian Reynolds, a food policy researcher at City St George's University in London, points to a fundamental limitation: most people lack the time, capacity, or inclination to engage deeply with shopping decisions beyond routine habit. Serge Hercberg acknowledges the same constraint more starkly. Food-tracking systems, he says, "essentially only touch the more privileged section of the population, who are not those most at risk of health problems linked to the way they eat." The very people who would benefit most from detailed nutritional guidance—those with fewer resources and less digital fluency—remain largely unreached.
Yuka's business model reflects its private-company status. CEO Julie Chapon, who relocated to the United States three years ago as the app's growth accelerated, emphasizes that revenue comes from premium subscriptions, not advertising or sponsored rankings. The company has never accepted payment from brands to influence ratings. Chapon attributes Yuka's particular success in America to the scale of the need—a diplomatic way of saying the US food system presents more problems to solve. The app's data comes from academic publications and public sources, and it incorporates Nutri-Score information into its assessments, creating a web of transparency tools that reinforce one another.
What remains unresolved is whether technology alone can address food-system inequities. Yuka has demonstrably changed what gets manufactured and what gets purchased among its users. But those users tend to be affluent, digitally engaged, and already inclined toward health consciousness. The app's red alerts and reformulated products represent a victory for informed choice—but only for those with the means and knowledge to choose. For everyone else, the supermarket aisle remains largely as it was.
Notable Quotes
They essentially only touch the more privileged section of the population, who are not those most at risk of health problems linked to the way they eat.— Serge Hercberg, food researcher, Sorbonne University
We have never accepted money from brands to influence our ratings or recommendations. Our revenue comes from users, through the premium version of the app.— Julie Chapon, CEO of Yuka
The Hearth Conversation Another angle on the story
Why does Yuka work so well in the US when the app is French?
The need is simply greater there. The US food system is more opaque, more additive-heavy, more ultra-processed. There's more distance between what people think they're buying and what's actually in the package.
But if the app is so effective at changing behavior, why do experts worry it's making inequality worse?
Because it only works for people who have a smartphone, time to scan barcuits, and enough money to buy the organic alternative when the app tells them to. Nathalie's son hates shopping with her now—she can afford to buy the better product, but most families can't.
So the people most harmed by bad food are the least likely to use the app?
Exactly. The app reaches the privileged. The people most at risk from diet-related illness—lower-income households—they're not scanning barcodes in the supermarket aisle.
How did Intermarché respond so quickly to Yuka's ratings?
Because 94 percent of users put products back when they see red. That's real money walking out the door. The retailer had to choose: reformulate or lose sales to competitors who did.
Is Yuka just another way for wealthy people to feel virtuous about their choices?
It's more than that. It's genuinely changed what manufacturers produce. Three thousand reformulated products, 160 additives removed. But yes, the virtue is concentrated among those who can afford it.
What would actually solve this problem?
Regulation. If the government mandated what Yuka recommends—banned certain additives, required simpler formulations—then everyone would benefit, not just app users. But that requires political will the food industry fights hard against.