Additives vs ultra-processed foods: what's the difference?
Does a product with many additives necessarily mean it's bad? And is an ultra-processed food always full of additives? The answer might surprise you.
What food additives are
Food additives are substances intentionally added to food to perform a technological function: preserving, colouring, thickening, emulsifying, stabilising or enhancing flavour. In Europe, every approved additive receives an E code (E100, E200, E300...) and must pass a safety assessment by EFSA.
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Not all additives are synthetic
Citric acid (E330), curcumin (E100), soy lecithin (E322) and ascorbic acid (E300, vitamin C) are naturally derived additives, also found in many unprocessed foods.
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Not all additives are dangerous
The vast majority of approved E codes are considered safe at permitted usage levels. The issue isn't the presence of an E code, but the quantity and combination of many different additives in the same product.
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Some additives deserve attention
Azo dyes (E102, E110, E122, E124, E129), preservatives such as nitrates (E249–E252), and intense sweeteners (E950–E962): these categories have more consistent risk evidence, especially for children.
What ultra-processed foods are
The term "ultra-processed" comes from the NOVA classification, developed at the University of São Paulo. It's not about nutrients, but about the industrial process that produced the food.
A food is ultra-processed (NOVA 4) when it contains ingredients you wouldn't find in a home kitchen: isolated proteins, modified starches, protein hydrolysates, glucose-fructose syrups, "nature-identical" flavourings, emulsifiers, colorings, stabilisers — often in complex combinations.
Snack cakes, packaged snacks, sugary breakfast cereals, carbonated drinks and "fruit-based" juices, reconstructed hot dogs and deli meats, frozen ready meals with sauces, flavoured yoghurts with thickeners, industrial sandwich bread with many additives.
Aged cheeses (they have few additives), quality whole cured meats (even if processed), artisan bread, traditional dried pasta, tomato preserves without additives, vinegar, extra-virgin olive oil.
When they overlap — and when they don't
This is the part that surprises most people: the overlap between "contains additives" and "ultra-processed" is not total.
The double problem: why both matter
Looking only at additives or only at the degree of processing leads to an incomplete picture. Health risks come from both directions.
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Risks linked to specific additives
Certain additives have documented effects: azo dyes and hyperactivity in children (EFSA 2007), nitrates in processed meat and carcinogenic nitrosamines, intense sweeteners and possible disruption of the gut microbiome.
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Risks linked to ultra-processing itself
Large-scale studies (NutriNet-Santé, UK Biobank) associate high consumption of NOVA 4 foods with increased risk of obesity, type 2 diabetes, cardiovascular disease and some cancers — independently of nutritional quality.
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The combination effect
Additive studies almost always test one substance at a time. But in real life we eat combinations of 10–20 different additives in the same meal. The synergistic effects are still poorly understood.
How to spot them in practice: the double read
For a complete assessment, apply both criteria whenever you read a label.
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Look for "lab-derived" ingredients
Modified starches, isolated proteins, hydrolysates, glucose-fructose syrups, "nature-identical" flavourings, partially hydrogenated oils: these are the main signal of ultra-processing even without many E codes.
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Count the E codes and identify critical categories
A natural antioxidant E code (E306) is very different from an azo dye (E102) or an intense sweetener (E951). Use the app to check the risk level of each additive.
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Consider the meal context
A balanced meal with vegetables, legumes and whole grains can better accommodate the occasional more processed product. The problem is when ultra-processed foods become the foundation of your daily diet.
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Use the app as a guide, not the final judge
E-Codes Reader shows you the NOVA classification and details on additives. Use it to better understand products, not to create anxiety. The goal is to reduce ultra-processed foods over time, not to eliminate them all in a single day.