Un-Processed, Processed, and Ultra-Processed Foods: What's the Difference?

Updated July 2026

Walk into any grocery store and the food comes at you in wildly different formats: a pyramid of apples in produce, a rotisserie chicken under the warmer, boxes of cereal and cans of Pringles on the shelves. You'd rightly guess the Pringles are processed. What surprises most people is that nearly everything other than those loose apples is processed too. The word covers so much ground that it's become almost useless as a warning label. What actually matters is how far a food has been pushed.

What does "processed food" really mean?

Almost everything we eat is technically processed. Even washing, chopping, or cooking counts. The USDA defines processed food as anything altered from its natural state, so your homemade tomato soup, your morning oatmeal, the rotisserie chicken, and the bagged salad are all "processed." That's why the label alone tells you almost nothing. The problem was never processing itself. It's the degree, and especially what gets taken out and added along the way.

What's the difference between processed and ultra-processed?

Think of it as a spectrum. At one end sit minimally processed foods, whole ingredients changed only enough to keep them safe, fresh, and edible: a bag of washed spinach, plain frozen berries, canned beans, rolled oats. At the far end sit ultra-processed foods (UPFs): industrial formulations built largely from refined extracts, such as sugars, starches, protein isolates, and oils, then held together with additives you'd never find in a home kitchen. Emulsifiers, artificial colors and flavors, non-sugar sweeteners, and preservatives. Frozen dinners, sugary cereals, chips, soda, and most packaged snacks live here. The tell is the ingredient list: if it reads like a chemistry inventory and the food is engineered to be hyper-palatable and shelf-stable, it's ultra-processed.

A useful shorthand comes from journalist Michael Pollan: if it's a food your great-grandmother wouldn't recognize as food, be suspicious. A more formal version is the NOVA classification, which sorts foods into four groups by degree of processing and is what most of the research now uses. The NOVA classification scheme is pictured above.

Are ultra-processed foods actually bad for you?

The evidence has gone from suggestive to overwhelming. UPFs now make up about 57% of the calories American adults eat, and roughly 67% of what children eat, so this isn't a fringe concern. Large studies have tied higher UPF intake to a consistent list of harms. A 2025 analysis across nine European countries, following more than 400,000 people, linked higher UPF consumption to greater all-cause mortality and to death from circulatory and heart disease specifically. Strikingly, the risk held up even after accounting for how much salt, sugar, and fat the foods contained, which points to something about the processing and additives themselves, not just the nutrition label. The concern is now mainstream enough that in 2026 European cardiology societies issued a consensus statement urging doctors to talk with patients about cutting back. I dig into the "why" in more detail in why ultra-processed foods are so bad for us, and into how they're engineered to overpower your willpower in why you can't eat just one.

How can you tell where a food falls?

Read the ingredient list, not the front of the box. The claims on the front, "natural," "high protein," "made with real fruit," are marketing. The truth is on the back. A short list of recognizable whole foods is a good sign. A long list studded with isolates, gums, dyes, and unpronounceable additives is the signature of ultra-processing, no matter how healthy the packaging looks. To see how far that gap can stretch, compare the Step One Foods Apple Cinnamon Bar with a typical "healthy" competitor. Ours: apples, dates, almonds, chia seeds, walnuts, dried cranberries, raisins, oat bran, plant sterols, cinnamon, Saskatoon berries. A comparable KIND breakfast bar leads with oats but quickly adds tapioca syrup, soy protein isolate, canola oil, cane sugar, molasses, and natural flavors, three added sweeteners and a protein isolate among them. Both are gluten-free and convenient; only one is built entirely from recognizable food.

Where does Step One fit on the spectrum?

At the minimally processed end, by design. Our "processing" is essentially mixing or pressing whole-food ingredients together to make a bar or an oatmeal, closer to what you'd do in your own kitchen than to anything industrial. We use whole oats and extra oat bran, real fruit, nuts, seeds, and plant sterols, and we deliberately leave out the preservatives, dyes, binders, and artificial sweeteners that define UPFs. We also don't play the labeling games, splitting or combining ingredients to disguise how much sugar is really there. It's the difference between food preparation and industrial manipulation, and it's why we were able to prove our foods lower cholesterol in a randomized controlled trial conducted with Mayo Clinic and the University of Manitoba.

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