FMCG Consumer Research: What to Get Right Before Fieldwork Starts

The FMCG and CPG category has always moved quickly, but right now it feels as if consumer behaviour is shifting in several directions at once.

GLP-1 weight-loss drugs are changing conversations around appetite, portion size and snacking. High-protein products have moved from gym culture into the mainstream grocery aisle. Gut health, nutrient density and “cleaner” ingredients are influencing everyday choices. Cost of living pressure, meanwhile, has made value far more complicated than simply choosing the cheapest product.

Then there is ingredient scrutiny. YouGov found that 61% of Britons are concerned about the safety of ingredients in everyday consumer products, while 46% have read and researched ingredient labels.

For FMCG and CPG brands, research has never mattered more. But the quality of that research is often shaped long before fieldwork begins. It is in the audience definition, the screener, the methodology and the assumptions you are willing to challenge before a single participant walks into the room.

Here is what to get right.

Don’t let your audience definition do the work for quant

Quant data is hugely valuable. It can tell you who is buying, how often, where from and at what price point. It has a place and should remain in that place, the issue comes when brands try and blur it.

Qualitative research has a different job.

Good qualitative FMCG consumer research should help you understand why people behave the way they do. It should uncover the contradictions, shortcuts and trade-offs that do not always show up neatly in a data set.

That means your audience definition needs room to breathe.

One common mistake is arriving with a very tight, quant-derived segment and expecting qual to simply explain it. The problem is that if the recruit is too narrow from the start, you risk only hearing from the people you already know about.

Take high-protein shoppers. A brief might focus on younger gym-goers, which may be right. But it could also miss people who started buying high-protein products after seeing recommendations on TikTok, shoppers using them as a convenient meal replacement, or consumers who associate protein with general health rather than fitness.

Those differences matter. They shape motivations, language, product expectations and purchase triggers.

A more useful starting question is not just “who buys this?” It is “who can help us understand how consumer behaviour is changing, and why?”

Because who you screen in, and who you screen out, shapes everything that follows.

Know which trends are actually reshaping your category right now

FMCG teams do not need to chase every trend. In fact, trying to respond to every hot topic is usually a quick route to muddy research.

But before designing a qualitative project, it is worth looking carefully at the forces that are genuinely changing behaviour in your category.

GLP-1 weight-loss drugs are a good example. In our blog on the GLP-1 impact on the food industry, we looked at how medications such as Wegovy and Mounjaro are beginning to influence appetite, portion size, snacking and food choice. This is not just a medical story. It is a consumer behaviour story too.

Ingredient scrutiny is another major shift. YouGov’s 2026 research found that 37% of British adults are more concerned about harmful substances than they were a year ago, while 44% have avoided certain products or brands because of ingredient concerns.

That is not just an attitude. That is behaviour.

Cost of living pressure still sits underneath all of this. But value does not always mean cheapest. It might mean lasting longer, feeling more filling, replacing something else, or feeling like a justified treat.

If your recruit does not reflect the pressures and contradictions shaping shoppers now, your insight can feel out of date before the project has even finished.

Design your screener to catch context, not just demographics

The screener is where FMCG research either earns its depth or quietly loses it.

A participant can look perfect on paper and still add very little to the research. They might be the right age, shopper type and purchase frequency, but if you do not understand the context behind their behaviour, you risk recruiting people who all look similar in a spreadsheet while bringing very little variety of perspective into the room.

The practical recommendation is simple: screen for behaviours, motivations and decision-making, not just demographics and category usage.

That also means being careful not to turn the screener into a mini quant survey. A screener should help identify the right mix of people for the research; it should not become a place to gather extra data simply because the opportunity is there. Too many “nice to know” questions can pull the recruit off course and dilute the focus on the motivations and behaviours that matter most.

Of course, you need to know whether someone buys the product, how often they buy it and where they shop. But you should also use the screener to identify the different routes people take into the category. Are they buying for health reasons, convenience, value, family needs or personal preference? Have they recently changed their behaviour, or have they been loyal to the category for years?

Questions such as “What prompted you to start buying this?”, “What would make you switch brands?” or “Who else influences this purchase?” can help you recruit a mix of participants with genuinely different experiences and motivations.

This matters because FMCG categories are increasingly shaped by external influences. Health advice, social media content, ingredient concerns, family preferences and economic pressures can all affect the same purchase decision.

For example, if someone says they avoid ultra-processed foods (UPFs), do not stop there. Use the screener to understand whether that belief actively changes what they buy, which categories it affects and where the influence came from. Someone who occasionally mentions UPFs is very different from someone who routinely reads ingredient labels and changes brands because of them.

The goal is not to make the screener longer. It is to make it smarter. A well-designed screener helps you recruit participants who can explain different behaviours, challenge assumptions and give you a fuller picture of what is happening in the category.

For more guidance, read our market research screener tips.

Think about methodology before you settle on a method

There is nothing wrong with focus groups. Used well, they can be brilliant for exploring reactions, language, brand perceptions and packaging ideas.

But they are not always the answer.

One of the biggest opportunities in FMCG research is choosing the method that fits the behaviour you are trying to understand.

If you want to know how shoppers talk about a new product concept, a focus group might be right. If you want to know whether people actually notice your product on shelf, an accompanied shop or intercept may tell you more.

That matters because so many decisions are small, quick and heavily contextual. A shopper might say price was the reason they chose one cereal over another, when actually it was shelf position, a health claim, or the fact they were buying on autopilot.

Customer closeness research can capture those moments as they happen. Digital ethnography can show something different again: how products live in the home, who uses them and whether they become part of a routine.

The point is not that one methodology is better than another. It is that methodology should follow the question.

Good FMCG research does not start with a predetermined method such as four focus groups. It starts with a clear understanding of the insight needed and the environment in which behaviour can be most effectively observed.

Brief your fieldwork partner like a collaborator, not a supplier

A good fieldwork partner should not just take the brief, fill the quotas and disappear until fieldwork day.

They should ask questions. They should notice when criteria feel too narrow. They should flag when a methodology may not suit the research question. They should be curious enough to challenge things, and experienced enough to know when those challenges are worth raising.

That is not being difficult. It is part of protecting the quality of the research.

The most useful fieldwork conversations happen when the recruitment partner understands the bigger picture, not just the sample spec. So share the context. Tell them what prompted the research, what the business is trying to decide, what you think might be true and what you are unsure about. Then give them permission to challenge you. That trust is what turns fieldwork from a transactional process into a proper collaboration.

This is especially important for customer closeness methodologies. In an accompanied shop, eligibility is only one part of the equation. You also need someone who is comfortable, engaged and able to talk through their decisions in the moment.

You are not just recruiting “a shopper”. You are recruiting someone who can help the research team understand something they could not see from the data alone.

A strong fieldwork partner should help strengthen the research by bringing experience, perspective and constructive challenge to the process

Better FMCG research starts before fieldwork

FMCG consumer behaviour is more complex, more fragmented and more interesting than it has been for years.

Shoppers are reading labels, questioning ingredients, responding to health trends, managing tighter budgets and making tiny trade-offs every time they shop. Some of those decisions are conscious. Many are not.

That is exactly why qualitative research is so valuable.

But the quality of the insight depends on the quality of the planning. If the audience is too narrow, the screener too shallow or the methodology too generic, you risk missing the people and moments that matter most.

The brands that get the most from FMCG research are not just the ones that commission it quickly. They are the ones that design it carefully.

Planning an FMCG research project? Take a look at how Angelfish Fieldwork supports FMCG market research recruitment, from focus groups and accompanied shops to online communities and ethnographic studies.

And if you want to see what thoughtful FMCG recruitment looks like, read our chocolate brand case study, where a global CPG brand used qualitative research to explore UK shopper behaviour, product perceptions and purchase triggers.