NOVA Food Score Explained
How GutCode uses the NOVA classification to rate food processing and protect your gut
5 min read
Not all calories are created equal — and not all foods affect your gut the same way, even if they share the same macronutrient profile. The key difference often comes down to how processed a food is. That is exactly what the NOVA food classification system measures, and it is at the heart of how GutCode evaluates your meals.
What is the NOVA classification?
NOVA is a food classification system developed by researchers at the University of São Paulo, Brazil, led by Professor Carlos Monteiro. First published in 2009 and refined over the following decade, NOVA groups all foods into four categories based on the extent and purpose of industrial processing they undergo — not their nutrient content.
The system has since been adopted by the Food and Agriculture Organization of the United Nations (FAO) and referenced in dietary guidelines across multiple countries including Brazil, France, and Belgium.
The four NOVA groups
| Group | Description | Examples |
|---|---|---|
| NOVA 1 | Unprocessed or minimally processed foods | Fresh fruit, vegetables, eggs, plain rice, nuts, fresh meat, milk |
| NOVA 2 | Processed culinary ingredients | Olive oil, butter, honey, salt, flour, sugar (used in cooking) |
| NOVA 3 | Processed foods | Canned vegetables, artisan cheese, cured meats, freshly baked bread |
| NOVA 4 | Ultra-processed food and drink products | Soft drinks, packaged snacks, instant noodles, chicken nuggets, most breakfast cereals |
The critical distinction is between NOVA 3 and NOVA 4. Processed foods (NOVA 3) are typically made by adding oil, sugar, or salt to whole foods. Ultra-processed products (NOVA 4) go much further — they are industrial formulations made mostly or entirely from substances derived from foods, often containing additives like emulsifiers, artificial flavors, and preservatives that you would never use in a home kitchen.
Why ultra-processed food matters for gut health
A growing body of research links high consumption of ultra-processed food (UPF) to negative gut health outcomes:
- Microbiome disruption — Emulsifiers commonly found in UPF (such as carboxymethylcellulose and polysorbate 80) have been shown in studies to alter gut bacteria composition and thin the protective mucus layer lining the intestine.
- IBS symptom flares — Many IBS patients report worsening symptoms after consuming UPF-heavy meals, likely due to a combination of additives, low fiber content, and high sugar or fat loads.
- Chronic inflammation — Diets high in NOVA 4 foods are associated with increased markers of systemic inflammation, which can affect gut permeability (sometimes called "leaky gut").
- Reduced fiber intake — Ultra-processed foods tend to be very low in dietary fiber, starving the beneficial gut bacteria that depend on it for energy. Eating 30 diverse plants per week is one of the best ways to counter this.
How GutCode uses NOVA
When you scan a meal with GutCode's AI food camera, the system doesn't just identify what you are eating — it automatically classifies each food item on the NOVA scale. This classification appears in your food detail card, giving you instant, color-coded feedback on how processed your meal is.
The NOVA rating feeds directly into your daily Gut Score. Days dominated by NOVA 1 and NOVA 2 foods push the score up; days heavy on NOVA 4 products pull it down. Over time, this creates a clear visual pattern: you can see exactly how your processing choices correlate with how your gut feels.
Practical swaps: NOVA 4 to NOVA 1
You don't need to eliminate all processed food overnight. Small, consistent swaps make a significant difference over weeks:
- Breakfast cereal (NOVA 4) → Rolled oats with fresh fruit (NOVA 1)
- Packaged fruit juice (NOVA 4) → Whole orange or homemade smoothie (NOVA 1)
- Instant noodles (NOVA 4) → Dried pasta with olive oil and vegetables (NOVA 1 + 2)
- Flavored yoghurt (NOVA 4) → Plain yoghurt with honey and nuts (NOVA 1 + 2)
- Packaged protein bar (NOVA 4) → Handful of nuts and a banana (NOVA 1)
Each swap moves the needle on your daily Gut Score and, more importantly, gives your gut bacteria the real food they thrive on.
NOVA is one piece of the puzzle
The NOVA classification is a powerful lens, but it is not the whole picture. Some minimally processed foods can still trigger symptoms in sensitive individuals (for example, onions and garlic are NOVA 1 but high in FODMAPs). That is why GutCode combines NOVA data with your symptom logs, the correlation engine, and your personal Food Map to give you a complete, individualised view.
Think of NOVA as the baseline layer: it ensures your overall food quality is heading in the right direction, while the rest of GutCode's tools help you fine-tune which specific foods work best for your body.
See your food's NOVA score — scan any meal and instantly know how processed it is.
Download GutCode free →