NOVA 4 Foods: What Ultra-Processed Really Means (And How to Spot Them)
Ultra-processed doesn't just mean unhealthy junk food. Here's what NOVA 4 actually means, what the research says, and how to identify it in your weekly shop.
The phrase "ultra-processed food" gets used a lot, often as a synonym for junk food or fast food. That's not quite right. Ultra-processed is a specific technical classification — and some of the foods that qualify might surprise you.
Understanding what it actually means is more useful than the vague sense that processed food is bad.
Where NOVA comes from
NOVA is a food classification system developed by Carlos Monteiro and his team at the University of São Paulo in the late 2000s. The name isn't an acronym — it comes from the Latin for "new."
The key insight behind NOVA is that conventional nutrition science focuses on nutrients — calories, fat, protein, carbohydrates. But Monteiro's research suggested that how a food is made might matter independently of what's in it. Two foods can have identical macro profiles and yet have very different effects on health, depending on the degree of industrial processing involved.
NOVA divides all foods into four groups based on the extent and purpose of processing.
Group 1 — Unprocessed or minimally processed foods. The food as it comes from nature, or with minimal modification. Fresh fruit, vegetables, plain meat, fish, eggs, plain milk, dried legumes, nuts, plain rice, flour, pasta.
Group 2 — Processed culinary ingredients. Substances extracted from Group 1 foods and used in cooking. Oils, butter, lard, sugar, salt, vinegar, starch. Not eaten on their own — used to prepare Group 1 and Group 3 foods.
Group 3 — Processed foods. Made by combining Group 1 and Group 2 foods using relatively simple techniques. Tinned fish in oil, salted nuts, cured meats, simple cheeses, artisan bread, jam, wine, beer. These are foods with recognisable ingredients that have been preserved or transformed.
Group 4 — Ultra-processed foods. Industrial formulations made mostly from substances extracted from food — or derived from food constituents — with little or no whole food. These typically contain ingredients that don't exist in home kitchens: emulsifiers, flavour enhancers, modified starches, hydrogenated oils, artificial sweeteners, colourings.
What makes something NOVA 4
The test isn't really about processing techniques. It's about ingredients.
Look at the ingredients list. If it contains things that:
- You wouldn't find in a home kitchen (xanthan gum, polysorbate 80, carrageenan, soy lecithin, maltodextrin, hydrolysed vegetable protein)
- Exist purely to mimic or enhance sensory properties (artificial flavours, colourings, flavour enhancers)
- Are there to extend shelf life or texture in ways home cooks don't replicate (modified starches, hydrogenated oils)
...then it's likely NOVA 4.
The quickest way to check is to scan the barcode with the Food Nutrition Scanner — it pulls the NOVA group from Open Food Facts for most packaged products, alongside the Nutri-Score grade and full macro breakdown.
The NOVA definition also emphasises purpose. Ultra-processed foods are designed to be convenient, hyper-palatable, and durable. The processing exists to make products shelf-stable for months, to enhance flavour beyond what the natural ingredients would provide, and to reduce production cost through ingredient substitution.
Some NOVA 4 examples that might surprise you
The obvious ones are clear: soft drinks, crisps, instant noodles, packaged cakes, fast food burgers, chicken nuggets.
But NOVA 4 also includes:
- Most breakfast cereals — including ones marketed as healthy. The grains are highly processed, and most contain flavourings, emulsifiers, or synthetic vitamins added back after processing strips them out.
- Flavoured yoghurts — including low-fat ones. The fruit isn't really fruit; it's a flavoured fruit preparation with stabilisers and thickeners.
- Protein bars — almost universally NOVA 4. Isolated protein powders, modified starches, emulsifiers, artificial sweeteners, synthetic flavours.
- Most packaged bread — even "wholemeal" or "seeded" bread from major supermarket brands. Compare the ingredients list to genuine sourdough or artisan bread.
- Plant-based meat alternatives — highly engineered products using isolated proteins, binders, and flavourings.
- Supermarket sauces and dressings — most contain thickeners, stabilisers, and flavour enhancers.
Some genuinely nutritious products qualify as NOVA 4 because of their ingredient list. A high-quality protein powder might score well on macros but still be NOVA 4 because it's made from isolated whey protein with emulsifiers.
What the research actually says
Multiple large-scale epidemiological studies have found associations between high ultra-processed food consumption and worse health outcomes, including:
- Higher risk of obesity and type 2 diabetes
- Higher risk of cardiovascular disease and stroke
- Higher all-cause mortality
- Higher risk of depression and cognitive decline
- Poorer gut microbiome diversity
The NutriNet-Santé study (France, 100,000+ participants) found a 10% increase in NOVA 4 consumption was associated with a 12% increased risk of cancer. The UK Biobank data showed similar associations for cardiovascular outcomes.
These are observational studies — they show correlation, not causation. People who eat a lot of ultra-processed food often have other risk factors: lower income, less access to fresh food, more sedentary lifestyles. Controlling for confounders is difficult.
But the associations persist across different populations and different methods of controlling for confounders. The consistency is notable.
There's also growing mechanistic evidence for why processing might independently matter: ultra-processed foods tend to be digested faster (raising blood glucose more sharply), disrupt satiety signalling (making it harder to stop eating), contain additives that may affect the gut microbiome, and expose consumers to food contact chemicals from packaging.
The research is not settled. But the weight of evidence is enough that the WHO, PAHO, and the dietary guidelines of Brazil, France, Canada, and Uruguay now specifically recommend limiting NOVA 4 consumption.
The Nutri-Score problem
One of the most useful ways to understand NOVA is to see what it catches that Nutri-Score misses.
Nutri-Score grades food on nutrients. A flavoured yoghurt might score B — the macros look decent, the protein is good, the sugar isn't too high. But if it's made from modified starch, artificial flavours, and stabilisers, it's NOVA 4. The nutrient profile looks fine; the processing level doesn't.
The reverse is also true. A piece of high-quality aged cheese might score D or E on Nutri-Score (high saturated fat, high salt) but is NOVA 3 — made with milk, salt, rennet, and cultures. The nutrient profile looks worse than it probably is; the processing level is fine.
This is why using both together gives a more complete picture than either system alone.
How to use NOVA practically
The goal isn't to eliminate all NOVA 4 foods from your diet. That's neither realistic nor necessary.
A more useful approach: know what you're eating. If most of your diet is Group 1 and Group 3 foods — vegetables, fruit, plain meat, legumes, simple dairy, tinned fish, artisan bread — then the occasional NOVA 4 food isn't an issue. The risk is when ultra-processed products become the default rather than the exception.
Practically, this means:
- Cook from whole ingredients when you can
- Compare packaged products by ingredients list, not just the nutrition table
- Be sceptical of health claims on ultra-processed products — low-fat, high-protein, and added-fibre claims on NOVA 4 products don't change their processing level
- Use the nutrition information as a starting point, not the full story
If you want to check the NOVA level of a specific product, the Food Nutrition Scanner looks up any food by name or barcode and shows the NOVA group alongside Nutri-Score grade, full macro breakdown, and a WorthIt verdict. Scanning your regular supermarket staples takes a few minutes and often turns up a result or two worth thinking about.
Research references: Monteiro et al., Public Health Nutrition (NOVA classification); Fiolet et al., BMJ (NutriNet-Santé cancer study); Srour et al., BMJ (NutriNet-Santé cardiovascular study); Bonaccio et al., IRCCS Neuromed cohort.