Most cheese you find in a grocery store is not ultra-processed, but some of the products sitting right next to it on the shelf absolutely are. The distinction depends less on the word “cheese” on the package and more on the ingredient list printed on the back. Under the NOVA food classification system, which is the framework most researchers use when studying ultra-processed foods, a block of aged cheddar and a pack of individually wrapped cheese singles belong to entirely different categories. The gap between them is wide, and your labels hold the clues.
How NOVA Classifies Food and Where Cheese Fits
NOVA sorts all foods into four groups based on how much industrial processing they have undergone. Group 1 covers unprocessed or minimally processed foods. Group 2 is culinary ingredients like oils, butter, and salt. Group 3 includes processed foods, which are Group 1 items altered by methods like curing, fermenting, or canning, usually with just a few added ingredients. Group 4 is the ultra-processed category: formulations made mostly from cheap industrial ingredients and additives, assembled through a series of manufacturing steps that go well beyond traditional cooking.
A wedge of Parmesan, a wheel of Brie, or a block of cheddar typically lands in Group 3. These cheeses are made from milk, salt, bacterial cultures, and rennet. The milk is fermented and pressed, and the cheese may age for months or years, but the process is essentially the same one humans have used for millennia. The NOVA system considers fermentation a form of processing, which is why traditional cheese sits in Group 3 rather than Group 1. But it is a long way from Group 4.
Ultra-processed foods, by contrast, are defined as “formulations mostly of cheap industrial sources of dietary energy and nutrients plus additives, using a series of processes.”1PubMed Central. The UN Decade of Nutrition, the NOVA food classification and the trouble with ultra-processing That description fits processed cheese products, cheese-flavored snacks, and many spreadable cheese formulations. The dividing line is not “how much work went into making it” but rather “what is it actually made from.”
What Ingredient Lists Actually Tell You
The single most reliable way to determine whether a cheese product is ultra-processed is to check its ingredient list for items you would never find in a home kitchen. Researchers have proposed a practical rule: if the list includes at least one substance rarely used in domestic cooking, or a class of additive designed primarily to make the final product more palatable or appealing, the item qualifies as ultra-processed. That means ingredients like hydrogenated oils, hydrolyzed proteins, emulsifiers, emulsifying salts, flavors, colorants, thickeners, and anti-foaming agents all serve as red flags.2PubMed Central. Ultra-processed foods: what they are and how to identify them
Compare a traditional cheddar label (milk, salt, cultures, enzymes) with a processed cheese label. The latter commonly includes emulsifying salts like trisodium citrate, tetrasodium pyrophosphate, or sodium hexametaphosphate, which are used to keep the fat and protein in a uniform, meltable state.3PubMed. Effect of emulsifying salts on the physicochemical properties of processed cheese made from Mozzarella Those salts are specifically named as markers of ultra-processing under NOVA. The moment they appear on a label, the product crosses into Group 4 territory regardless of whether it also contains real cheese.
Processed cheese is popular for good reasons: it has a uniform structure, melts predictably, and lasts longer on the shelf. But the way it achieves those properties, through emulsifying salts, added proteins, and various stabilizers, is precisely what makes it ultra-processed by NOVA standards.4BIO Web of Conferences. Enhancing Nutritional Value of Processed Cheese Slices through Soy Protein Isolate: A Physicochemical Study
The Gray Zone Between Traditional and Ultra-Processed
Not every cheese product falls neatly into Group 3 or Group 4. Pre-shredded cheese is a common source of confusion. A bag of shredded cheddar contains the same cheese you could buy in a block, but manufacturers coat the shreds with anticaking agents, typically blends of potato starch, cellulose, or calcium sulfate, to keep them from clumping together.5PubMed. Consumer perceptions of anticake agents on shredded Cheddar cheese Some shredded cheeses also receive an antimold treatment. Natamycin, an antifungal, is applied to the surface of certain cheese shreds to suppress mold growth during storage.6PubMed. Comparative study of a semisynthetic derivative of natamycin and the parent antibiotic on the spoilage of shredded cheddar cheese
Do those additions make shredded cheese ultra-processed? Researchers disagree. The NOVA system considers cellulose powder (sometimes listed as “powdered cellulose” on the label) a cosmetic additive because it does not exist in a home kitchen. Others argue that a thin anticaking coat on otherwise-real cheese is functionally trivial. This is one of several gray areas where the NOVA framework produces inconsistent classifications depending on who is doing the sorting. Studies have found that plain, unsweetened dairy products have been assigned to all four NOVA groups by different researchers, partly because fermentation itself is a Group 3 trait while certain incidental ingredients can push the same product into Group 4.7European Journal of Clinical Nutrition. Ultra-processed foods: how functional is the NOVA system?
If you want to avoid the gray zone entirely, the simplest move is to buy cheese in block or wedge form and shred it yourself. But if a bag of shredded cheddar with potato starch and natamycin is the only additive-containing cheese in your cart, you are far from the territory of cheese spreads and snack crackers.
Why the Type of Processing Matters for Health
The reason anyone cares about the ultra-processed label in the first place is the growing body of evidence linking high UPF intake to worse health outcomes. But cheese complicates that story, because even cheese high in saturated fat appears to behave differently in the body compared with other saturated-fat sources. Researchers call this the “dairy matrix effect”: the physical structure of cheese, with fat globules trapped inside a protein-and-calcium scaffold, changes how your body absorbs and metabolizes the fat.
A randomized controlled trial tested this directly. Participants consumed the same amount of dairy fat either packaged entirely within cheese or eaten as separate butter, cream, and protein. Those who ate their fat in the cheese matrix ended up with meaningfully lower total cholesterol and LDL cholesterol than those who ate the same fat in non-cheese form.8PubMed. Dairy matrix effects: response to consumption of dairy fat differs when eaten within the cheese matrix-a randomized controlled trial The implication is that cheese is not just a vehicle for delivering fat and protein; the way those nutrients are physically structured inside the food changes their metabolic impact.
This matrix effect is part of why dairy fat and cardiovascular risk have a complicated relationship. Reviews of the evidence have found that while saturated fat from dairy does raise LDL cholesterol, that rise does not consistently translate into increased cardiovascular disease risk, particularly when the fat comes from cheese and other fermented dairy.9PubMed Central. Saturated fats, dairy foods and cardiovascular health: No longer a curious paradox? Some aged and molded cheeses may offer additional benefits. Research on Roquefort and similar blue cheeses has identified secondary metabolites produced by the ripening fungi that appear to inhibit cholesterol synthesis and reduce inflammatory markers.10PubMed. Could cheese be the missing piece in the French paradox puzzle?
The dairy matrix effect is essentially disrupted in ultra-processed cheese products, which break down the original cheese structure, separate out its components, and reassemble them with emulsifiers and stabilizers. When you melt real cheese into a sauce at home, the matrix partly survives. When a factory dissolves cheese into a slurry and reconstitutes it with sodium phosphates, the original structure is gone. Whether that matters for your long-term health is an open question, but it is worth understanding that “cheese” and “processed cheese product” are not metabolically interchangeable.
Cheese Consumption and Longer-Term Health Outcomes
Large observational studies and genetic analyses have generally painted a favorable picture of cheese consumption, at least for traditional varieties. A recent large-scale study found that for every additional 20 grams per day of high-fat cheese consumed, the risk of death from any cause dropped by about 3%, and cardiovascular mortality dropped by about 4%. Low-fat cheese showed a similar, though slightly weaker, inverse association with all-cause mortality.11PubMed Central. High-fat and low-fat fermented milk and cheese intake, proteomic signatures, and risk of all-cause and cause-specific mortality These are modest effects, and observational data always comes with caveats about confounding factors. But the direction of the association is consistent across multiple studies: cheese does not appear to be harmful in moderate amounts, and it may be mildly protective.
The relationship with type 2 diabetes is also interesting. A Mendelian randomization study, which uses genetic variation to simulate a randomized trial, found that higher genetically predicted cheese intake was associated with a substantially lower risk of type 2 diabetes. The researchers concluded that moderate cheese consumption may help prevent and control the condition.12PubMed Central. The causal association of cheese intake with type 2 diabetes mellitus: results from a two-sample Mendelian randomization study These findings apply to traditional cheese, not to ultra-processed cheese products, which have a very different ingredient profile and have not been studied with the same granularity.
Emulsifiers Deserve Their Own Scrutiny
One reason ultra-processed cheese products concern researchers goes beyond their calorie content or fat profile: it is the emulsifiers. Emulsifying salts and synthetic emulsifiers are core ingredients in processed cheese, and emerging evidence suggests some of these compounds affect the gut in ways that have nothing to do with nutrition in the traditional sense.
Animal and laboratory studies have shown that common food emulsifiers like carboxymethylcellulose (CMC) and polysorbate 80 can alter gut bacteria populations, increasing pro-inflammatory species while reducing beneficial ones. These changes promoted inflammation and altered the gut barrier in animal models.13PubMed Central. Food Emulsifiers and Metabolic Syndrome: The Role of the Gut Microbiota When researchers exposed human gut microbiota samples to these same emulsifiers in a controlled lab setting, both CMC and polysorbate 80 directly increased the bacteria’s pro-inflammatory potential. The CMC effect was rapid, appearing within a single day. When the emulsifier-exposed microbiota samples were transferred into germ-free mice, the animals developed many of the same gut and metabolic disturbances seen in mice directly fed the emulsifiers.14PubMed Central. Dietary emulsifiers directly alter human microbiota composition and gene expression ex vivo potentiating intestinal inflammation
Not every emulsifier used in processed cheese has been tested this way, and the doses used in these studies do not always mirror real-world eating patterns. But the research is enough to make scientists pay close attention. Emulsifying salts like sodium phosphates, which are ubiquitous in processed cheese, are chemically distinct from CMC and polysorbate 80, and their gut effects are less well studied. Still, the broader point holds: ultra-processed cheese products introduce a class of industrial ingredients that traditional cheese does not contain, and those ingredients are under active investigation for potential health effects.
The Clean Label Movement and What It Means for Cheese
Consumer pushback against ultra-processed ingredients is reshaping the cheese industry. The “clean label” trend, driven by shoppers who want shorter ingredient lists and recognizable components, has pushed manufacturers to find alternatives to synthetic additives while still maintaining food safety, texture, and shelf life.15MDPI Foods. Clean Label Approaches in Cheese Production: Where Are We? Some companies have replaced cellulose-based anticaking agents with potato starch alone, or swapped artificial colorants for annatto (a plant-derived dye that has been used in cheese for centuries). Others have reformulated processed cheese products to reduce the number of emulsifying salts.
This trend creates both clarity and confusion for consumers. A cheese marketed as “natural” in the United States may still contain anticaking agents or antimold treatments. The word “natural” on a cheese label generally refers to the cheese itself being made through traditional fermentation rather than through emulsification of cheese components, but it does not guarantee the absence of all additives. Meanwhile, some products labeled “cheese food” or “cheese product” are legally required to use those terms because they do not meet the regulatory standards of identity for cheese. U.S. federal regulations define specific composition requirements for products labeled as particular cheese varieties, and anything that falls outside those requirements must be labeled differently.16Electronic Code of Federal Regulations (eCFR). Title 21 — Food and Drugs, Part 133 — Cheeses and Related Cheese Products So the label terminology itself gives you a rough first pass: if the package says “pasteurized process cheese food” or “cheese product,” you are almost certainly looking at something ultra-processed.
Why the NOVA System Struggles with Cheese
The NOVA classification is a useful research tool, but it was designed to sort industrial food supply patterns at a population level. It was never meant to be a precision instrument for individual grocery decisions, and cheese exposes some of its weaknesses. The system groups all ultra-processed foods together, from a cheese single to a bag of cheese-flavored puffs to a frozen pizza. Lumping a slice of processed Swiss with a neon-orange snack product obscures enormous differences in nutrient content, ingredient quality, and likely health effects.
Researchers have documented the inconsistency directly. When different teams classify the same dairy products using NOVA, they frequently disagree. Plain unsweetened yogurt, for example, has been placed in all four NOVA groups by different research groups, because the framework’s rules about fermentation and incidental ingredients create genuine ambiguity.7European Journal of Clinical Nutrition. Ultra-processed foods: how functional is the NOVA system? The same problem applies to cheese. A traditional Gruyère aged for 12 months is clearly Group 3. A cheese single wrapped in plastic is clearly Group 4. But the vast middle ground, including cottage cheese with stabilizers, cream cheese with guar gum, and smoked gouda with “natural smoke flavor,” gets sorted differently depending on how strictly the classifier interprets NOVA’s rules.
This does not mean the ultra-processed label is useless. It means that for cheese specifically, you are better off reading the ingredient list yourself than relying on a classification system to do the work for you. The label tells you everything: if you see emulsifying salts, hydrolyzed protein, modified starch, or artificial flavors, the product has been industrially reformulated. If you see milk, salt, cultures, and enzymes, it has not.
What Packaging Adds to the Picture
One dimension that rarely makes it into the ultra-processed food conversation is the packaging itself. Cheese is a fatty food, and fat is particularly good at pulling chemical compounds out of plastic wrapping. A study that wrapped three types of cheese in standard food-grade PVC film found that a plasticizer compound (DEHA) migrated into the cheese at levels that depended on the fat and moisture content. After 240 hours under refrigeration, the fattier, harder cheeses accumulated substantially more DEHA than softer, lower-fat varieties. For two of the three cheese types tested, the plasticizer levels exceeded the European Union’s upper safety limit for migration from packaging into food.17PubMed. Migration of di-(2-ethylhexylexyl)adipate plasticizer from food-grade polyvinyl chloride film into hard and soft cheeses
This is not specific to ultra-processed cheese. Traditional cheese wrapped in PVC film at a deli counter faces the same issue. But it is worth noting because ultra-processed cheese products tend to come in more plastic-intensive packaging (individual wrappers, sealed slices, squeeze tubes) and spend longer in that packaging before being eaten. If you are already thinking about ingredient quality, the wrapping material is part of the equation too. Cheese sold in wax, paper, or vacuum-sealed bags without PVC film avoids this particular concern.
From Neolithic Caves to Factory Lines
Cheese has been made for at least 7,000 years, with evidence of early production stretching across the Near East, the Mediterranean, and Central Europe.18Advances in Hospitality, Tourism, and the Services Industry. History of Cheese and Cheese Making For most of that history, the process barely changed: milk, a coagulant, salt, time. The industrialization of cheese in the United States introduced pasteurization, commercial starter cultures, and eventually membrane filtration and automated production lines, all of which increased consistency and output while keeping the fundamental chemistry recognizable.19PubMed. A 100-Year Review: Cheese production and quality
Processed cheese was a different invention entirely. Developed in the early twentieth century as a way to use up cheese scraps and create a product with a longer shelf life and more predictable melting behavior, it required a fundamentally new approach: dissolving cheese in emulsifying salts, blending it with other dairy ingredients, and reforming the mixture into a uniform mass. That product solved real problems for consumers and food-service operators, and it remains widely popular. But it is a manufactured formulation in a way that a wheel of Gruyère is not. The two share a name but not a method, and the NOVA system is, in this case, correctly identifying a real difference between them.