Table of Contents
Quick Summary: NOVA groups define foods by the degree and purpose of processing, not by calories or macros. The four groups are: (1) unprocessed/minimally processed, (2) processed culinary ingredients, (3) processed foods, and (4) ultra-processed foods (UPFs). Research links high UPF intake to worse health outcomes, though the exact mechanisms are still being studied.1,2 Use NOVA alongside nutrition labels to build meals centered on Groups 1–2, with limiting or avoiding Group 4.
You've probably heard the term "ultra-processed foods" tossed around in health headlines. But what does it actually mean—and how do you know if something qualifies? That's where the NOVA classification system comes in. Developed by researchers at the University of São Paulo in Brazil, NOVA provides a framework for understanding food based on how it's made, not just what nutrients it contains.3
This isn't about demonizing all processed foods (canned beans and frozen vegetables are processed, after all). It's about recognizing that industrial formulations designed for profit and shelf-life often differ fundamentally from foods prepared in a kitchen. Understanding NOVA can help you make more informed choices at the grocery store—without obsessing over every ingredient.
NOVA's Four Groups (with Quick Examples)
| Group | Definition | Common Examples | Label Cues |
|---|---|---|---|
| 1. Unprocessed / Minimally processed | Whole foods with minimal changes like washing, cutting, chilling, or freezing. | Fresh/frozen vegetables, fruit, eggs, plain yogurt, plain oats, raw nuts, fresh meat/fish. | Short ingredient list (or none). |
| 2. Processed culinary ingredients | Ingredients extracted or refined from Group 1 foods; used for cooking. | Olive oil, butter, salt, sugar, honey, vinegar, spices. | Single-ingredient items used in recipes. |
| 3. Processed foods | Group 1 + Group 2 combined; preserved or made more palatable. | Bread from flour/water/yeast/salt, cheese, canned vegetables, plain canned fish, traditional ham. | Short, recognizable ingredients; limited additives. |
| 4. Ultra-processed foods (UPFs) | Industrial formulations with additives and ingredients not common in home kitchens. | Sweetened cereals, many protein bars, soda, packaged snacks, instant noodles, some ready meals. | Look for isolates, modified starches, emulsifiers, colorings, non-nutritive sweeteners. |
Definitions adapted from NOVA's official descriptions and FAO guidance.3
Why NOVA Matters (and What the Science Says)
The research connecting ultra-processed food intake to health outcomes has grown substantially over the past decade. Higher UPF consumption is consistently linked with worse cardiometabolic outcomes, mental health issues, and increased mortality risk in large-scale reviews.1 While correlation isn't causation, the pattern is hard to ignore.
One landmark study offers particularly compelling evidence. In a controlled feeding trial, researchers found that participants on an ultra-processed diet consumed about 500 calories more per day and gained weight compared to those eating minimally processed foods—even when both diets were matched for macros and rated equally palatable.4 Ultra-processed foods seem to override normal satiety signals.
That said, important nuance exists. The UK's Scientific Advisory Committee on Nutrition (SACN) concluded in its 2025 rapid evidence update that while associations between UPF and adverse health outcomes are "concerning," it remains unclear whether the problem is processing itself or the fact that most UPFs happen to be high in calories, saturated fat, salt, and sugar.2 In other words, NOVA is a useful red-flag system, but it doesn't replace paying attention to overall diet quality.
For a deeper look at which whole and minimally processed foods support weight management, see our complete guide to the best foods for weight loss.
How to Use NOVA When You Shop or Plan Meals
You don't need to memorize food science terminology to apply NOVA practically. A few simple practices make a real difference.
Start with Groups 1–2. Build your plates around produce, lean proteins, whole grains, legumes, nuts, and simple culinary ingredients like olive oil and herbs. These form the foundation of virtually every traditional eating pattern associated with good health.
Scan labels quickly. The longer the ingredient list—and the more isolates, emulsifiers, colorings, or non-sugar sweeteners you see—the more likely you're looking at Group 4. Ingredients you wouldn't find in a home kitchen (high-fructose corn syrup, hydrogenated oils, protein isolates, modified starches) are telltale signs.
Keep Group 3 as supporting players. Items like simple breads, plain canned vegetables and beans, cheese, and traditionally cured meats can make balanced meals faster without tipping into ultra-processed territory.
Use NOVA alongside nutrition facts. NOVA flags processing level, but the Nutrition Facts panel still matters for protein, fiber, sodium, and added sugars. A minimally processed food can still be calorie-dense; an ultra-processed food might be fortified with vitamins. Both tools give you the full picture.
Many Group 1 foods are also excellent sources of dietary fiber, which plays a critical role in satiety and gut health. Our Ultimate Guide to Dietary Fiber covers the full science.
Where Clean Eatz Kitchen Fits In
Our ready-to-heat meals prioritize high-quality proteins, vegetables, and healthy carbs. We focus on real ingredients you'd recognize from your own kitchen. Some offerings align with Group 3 (processed), while others may include ingredients that place them in Group 4—we believe in transparency, so you can always check the ingredient list on each product page to decide what fits your goals.
If building meals around minimally processed whole foods sounds great in theory but overwhelming in practice, that's exactly why meal prep services exist. Our Build Your Meal Plan option lets you choose meals that match your preferences, while our High Protein Meal Plan emphasizes the lean proteins that form the backbone of a Group 1-focused diet.
Limitations and Ongoing Debate
NOVA was designed as a public-health tool, not a nutrient score. Critics point out that not all ultra-processed foods are equal—a fortified breakfast cereal and a bag of candy both land in Group 4, but their nutritional profiles differ dramatically. The SACN report also notes that some foods classified as UPF (like wholegrain bread with added emulsifiers) could still fit into a healthy diet.2
Researchers continue to debate whether the health effects stem from processing itself, the nutrient profile of most UPFs, or the combination of additives, texture, and eating speed. For consumers, the practical takeaway is straightforward: pair NOVA awareness with basic label literacy. When in doubt, ingredients you recognize are usually a safer bet than industrial formulations.
FAQs
Is NOVA the same as a "healthy vs. unhealthy" score?
No. NOVA classifies processing level, not overall nutrition. A food can be minimally processed but still high in calories, or ultra-processed but fortified with nutrients. Use NOVA alongside the Nutrition Facts label for the full picture.
Can a high-protein convenience food be non-UPF?
Sometimes—if ingredients are simple and recognizable. Products with protein isolates, modified starches, and cosmetic additives like colorings typically fall into Group 4. Check the ingredient list: the more unfamiliar industrial-sounding terms, the more likely it's ultra-processed.
How often should I choose ultra-processed foods?
There's no official limit, but most guidance suggests minimizing routine UPF intake while building meals around Groups 1–2. The occasional UPF won't derail a healthy diet, but when ultra-processed foods become the foundation rather than the exception, health outcomes tend to suffer.
What countries use NOVA in their dietary guidelines?
Brazil, Uruguay, Peru, and Ecuador have published national dietary guidelines recommending limits on ultra-processed foods.3 The Pan American Health Organization and FAO have also adopted NOVA in their guidance, and several other countries are considering similar approaches.
Is bread considered ultra-processed?
It depends on the bread. Simple bread made from flour, water, yeast, and salt is Group 3 (processed). Mass-produced bread with added emulsifiers, preservatives, and dough conditioners falls into Group 4 (ultra-processed). Check the ingredient list—if it reads like a chemistry set, it's likely UPF.
References
1. Lane MM, et al. Ultra-processed food exposure and adverse health outcomes: umbrella review of epidemiological meta-analyses. BMJ. 2024;384:e077310. https://www.bmj.com/content/384/bmj-2023-077310
2. Scientific Advisory Committee on Nutrition. Processed foods and health: SACN's rapid evidence update. UK Government. April 2025. https://www.gov.uk/government/publications/processed-foods-and-health-sacns-rapid-evidence-update
3. Monteiro CA, et al. The UN Decade of Nutrition, the NOVA food classification and the trouble with ultra-processing. Public Health Nutrition. 2018;21(1):5-17. https://pmc.ncbi.nlm.nih.gov/articles/PMC10261019/
4. Hall KD, et al. Ultra-processed diets cause excess calorie intake and weight gain: an inpatient randomized controlled trial of ad libitum food intake. Cell Metabolism. 2019;30(1):67-77. https://www.cell.com/cell-metabolism/fulltext/S1550-4131(19)30248-7
