NutritionFebruary 17, 2026·5 min read
By the CIRRUS Editorial Team — how we write and source this
Ultra-processed foods: what the classification actually means
It's become a catch-all term for "bad food." The actual classification system is more specific than that.
The NOVA classification system, developed by Brazilian researchers, sorts foods into four groups based on degree and purpose of processing — unprocessed/minimally processed, processed culinary ingredients, processed foods, and ultra-processed foods, the last defined by industrial formulations with ingredients rarely used in home kitchens (emulsifiers, flavor compounds, isolated proteins).
The distinction isn't simply about calories, sugar, or fat content — a food can be high in sugar without being ultra-processed (like honey) or relatively modest in calories while still meeting the ultra-processed definition through its ingredient formulation and industrial production method.
Observational research has linked higher ultra-processed food intake to a range of adverse health outcomes, and a notable 2019 controlled feeding trial found people spontaneously ate more calories on an ultra-processed diet than a matched unprocessed one, even when the two diets were nutritionally similar on paper.
The practical heuristic that tracks reasonably well with the formal classification: an ingredient list with several items you wouldn't keep in a home kitchen is a reasonable flag, more useful day-to-day than trying to memorize the formal NOVA categories.
This article is general health information, not medical advice, and doesn’t replace evaluation by your own physician. Talk to a doctor about anything specific to your own diagnosis or treatment.