16 June 2026 — High-protein labelling made sense when it was rare. Now it is everywhere, and new research across France and the Netherlands reveals that consumers have started treating it as a reason for doubt rather than a reason to buy.
For years, high-protein was one of the most reliable claims a food or beverage brand could make. It signalled effort, nutrition, a product that worked harder. The category grew quickly, and so did the label. It spread from sports nutrition into yoghurt, cereal, snacks, water, and beyond.
That growth has become a problem. In March 2026, Bolt Insight conducted 40 in-depth AI-moderated interviews with primary grocery shoppers across France and the Netherlands, exploring how consumers now relate to high-protein claims. The findings revealed not indifference, but something more active and more damaging: structured disbelief.
“High-protein used to be a shortcut to trust. It has become a prompt to question.”
The Claim Became a Category
The problem is not that protein is unimportant to consumers. They still care deeply about it, particularly in the context of satiety, energy, and healthy ageing. The problem is that the claim has been detached from the ingredient.
Walk down any supermarket aisle today and you will find high-protein yoghurt, high-protein cereal, high-protein water, high-protein crisps. The claim has spread so far and so fast that it no longer carries information. When everything is high-protein, the label tells you nothing about what makes this product worth choosing.
“Nowadays, sometimes I start to doubt. It’s so trendy to write ‘high-protein’ on all products that sometimes it becomes a shame.” — Consumer, France
The research identified four specific triggers for rejection. Overexposure is the first: sheer repetition has stripped the claim of meaning. Processing is the second: consumers are acutely sensitive to whether protein belongs naturally in a product or has been engineered into it. Exaggeration is the third: when a product contains marginally more protein than a standard equivalent, calling it high-protein feels dishonest. And unjustified premiums are the fourth: consumers notice when the price goes up but the evidence does not.
Together, these have produced something brands rarely encounter: a functional claim that actively reduces purchase intent.
Consumers Have Built Their Own Credibility Filter
One of the most striking findings from the research is how systematic consumers have become in evaluating protein claims. Rather than accepting or rejecting a label instinctively, they now run a series of checks.
They ask whether protein is relevant to this type of product at all. They ask whether the level is meaningfully higher than what they would find elsewhere. They ask whether the product as a whole feels healthy and balanced, or whether the protein claim is carrying a product that would otherwise struggle. They ask whether the protein source is natural or added. And they ask whether the claim can be verified, either through nutritional information on pack or through ingredients they recognise.
This is not the behaviour of disengaged shoppers. It is the behaviour of shoppers who have been burned before and are protecting themselves. Brands taught them to be this way.
Same Fatigue, Different Logic
Perhaps the most striking finding is not that both markets show protein fatigue, but how differently it manifests.
In France, the reaction is largely emotional. Consumers talk about feeling overwhelmed and misled. They use the language of betrayal. Their trust in a protein claim depends heavily on whether the product feels authentic and natural, and claims attached to heavily processed products trigger something close to instinctive rejection.
In the Netherlands, the response is more methodical. Dutch consumers compare protein content across similar products, question whether a price premium is arithmetically justified, and want explicit reasons to believe. They are not hostile; they are demanding. Transparency is the price of entry.
“Only products that actually contain more protein than average should claim to be a high-protein product.” — Consumer, Netherlands
The strategic implication is that there is no single fix. A brand that builds trust in France by emphasising natural ingredients and clean processing will need a different approach in the Netherlands, where the same consumer wants a nutrition label they can interrogate. Both markets are recoverable. But they require different conversations.
This is Not a Crisis for Protein. It is a Crisis for Lazy Protein Claims.
The research is clear on one point: consumers have not given up on protein. In both markets, it remains genuinely important to shoppers, particularly in specific moments: post-exercise, for satiety, during life stages where muscle maintenance matters. The desire is real.
What has collapsed is tolerance for claims that are not earned. Consumers have effectively raised the bar, and in doing so they have created an opportunity for brands willing to clear it.
“Brands don’t just stop at the ‘high-protein’ mention, but explain why their products are high in protein.” — Consumer, France
The brands that will benefit from this moment are those that can show why their product is genuinely high in protein, where that protein comes from, and why it matters for the specific occasion the product is designed for. Protein as an afterthought, bolted on for margin or positioning, will continue to be rejected. Protein as proof of a better product will be rewarded.
Bolt Insight conducted this research because the same tension kept surfacing with clients across the food and beverage sector: they knew something had shifted with consumers, but could not name it precisely enough to act on it. The findings give them something concrete to work with.
Couldn’t make the webinar? Fill in the form below to watch our webinar on-demand and see exactly what French and Dutch shoppers told our AI moderator about protein, when it works, when it doesn’t and what brands need to do differently.
