What Are Unprocessed Foods? NOVA Group 1, Defined

Unprocessed foods are the edible parts of plants, animals, and fungi taken from nature and eaten without alteration: a peach off the tree, an egg from the carton, a fillet of fresh cod, a handful of blueberries. In the NOVA framework that nutrition science now uses as its standard vocabulary, these sit in Group 1, and the group has a second, equally important half: minimally processed foods, which have been changed only in ways that remove nothing essential and add nothing at all.

That second half is what makes the definition genuinely useful for shopping rather than just philosophically tidy. Drying, crushing, grinding, roasting, boiling, pasteurizing, refrigerating, freezing, vacuum-packing, and non-alcoholic fermentation all keep a food inside Group 1, methods that do not substantially change the nutritional content of the food, provided no salt, sugar, oil, or other substance is introduced. The purpose of these operations is preservation and convenience, extending life and making food storable, safe, or easier to prepare, without changing what the food fundamentally is.

The roster of qualifying foods is therefore much longer than raw produce. Rolled oats, dried lentils and chickpeas, brown and white rice, plain frozen spinach, unsweetened frozen mango, raw and unsalted roasted nuts, 100% peanut butter ground from nuts alone, plain milk and plain yogurt with live cultures, dried herbs, ground spices, plain coffee and tea, and dried pasta made from durum wheat and water. None of these would strike most shoppers as unprocessed, yet all belong to Group 1 because the transformation involved no added substances.

The boundary becomes visible when you look at what sits just outside it. Add salt to nuts and they move to Group 3. Add sugar to frozen fruit, same move. Milk becomes cheese through salting and aging: Group 3. White flour is an interesting edge: milling wheat keeps flour in Group 1, but flour functions mostly as an ingredient for further processing. And the moment a formulation includes substances with no domestic equivalent, an emulsifier, an isolate, a synthetic dye, it jumps categories entirely, a distinction unpacked in our NOVA classification guide.

A few classic gray-zone questions have clean answers under this definition. Is pasteurized milk unprocessed? Yes, minimally processed; heat treatment adds nothing. Are frozen vegetables as good as fresh? Nutritionally they are often just as good and sometimes better, since flash-freezing hours after harvest outpaces fresh produce that spent a week in transit. Is white rice disqualified for being milled? No; milling removes bran but introduces nothing, so it stays Group 1, though the whole-grain version retains more fiber. Is orange juice unprocessed? Freshly squeezed juice qualifies; reconstituted juice from concentrate does not.

Why does any of this matter beyond taxonomy? Because Group 1 foods share a structural property that no nutrient label captures: their food matrix is intact. Fiber, water, protein, and micronutrients arrive packaged together the way digestion evolved to handle them, which is a large part of why diets anchored in Group 1 consistently correlate with better satiety and metabolic health, an effect demonstrated directly in a controlled NIH feeding trial. For a ready-made shopping version of this category, see the unprocessed foods list, and for the roundup of foods that escape processing altogether, what foods are not processed covers the strictest tier. When packaging makes the call ambiguous, a BerryPure scan settles it: if anything was added, the label knows, and now so do you.