Ultra-processed food and kids, explained

"Ultra-processed" is now on magazine covers, in policy documents and in the comments under every food post. It's also frequently used by people who couldn't define it. Here's what it actually means.

Where the term comes from

NOVA was developed by researchers at the University of São Paulo, led by Carlos Monteiro. Its move was to stop asking what nutrients are in this? and start asking what was done to it? — sorting food into four groups:

Group 4 is the one under discussion: industrial formulations built largely from substances you wouldn't have in your kitchen — protein isolates, modified starches, emulsifiers, colours and flavours — engineered for shelf life and palatability.

The number that made this a headline

Research published in JAMA in 2021 found ultra-processed foods supplied roughly two-thirds of the calories consumed by US children and adolescents, and that the share had risen over the preceding two decades.

That's the statistic behind most of the coverage, and it's worth sitting with. This isn't a fringe category. For most American children it is the default diet.

What the evidence supports — and what it doesn't

Observational studies consistently associate high ultra-processed intake with poorer health outcomes. A small number of controlled feeding studies have found people eat more calories on an ultra-processed diet than on a matched unprocessed one.

But be careful about the leap most articles make:

• Most of the evidence is observational. People who eat more ultra-processed food differ in income, time, and much else.
• "Processing" may be a proxy. It's genuinely unclear how much is the processing itself versus the sugar, salt, fat and calorie density that come with it.
• The category is broad to the point of strain. NOVA puts plain supermarket whole-grain bread and a bag of candy in the same group. That should bother you a little.

Why GreenCheck doesn't grade on NOVA

GreenCheck rates ingredients individually and penalises long ingredient lists, which correlates with ultra-processing without being the same claim. We keep the NOVA group where OpenFoodFacts supplies it, but it doesn't drive the grade.

This has a visible consequence worth being straight about: because the score penalises ingredient count, a fortified product gets pushed toward a worse grade by its added vitamins. Cheerios has seventeen ingredients, eleven of which are added vitamins and minerals, and no ingredient we rate above a 6. It still grades poorly. Our method is described in full in how we grade food — including its edges.

A realistic way to use this

Given that ultra-processed food is two-thirds of the average child's calories, "eliminate it" is not advice, it's a fantasy. Displacement is the achievable version:

• Swap one recurring item, not the whole pantry. The snack that shows up daily matters more than the birthday party.
• Use the ingredient list as your proxy: shorter is a decent rule of thumb.
• Don't moralise it. A child who feels policed at the table is a different, and worse, problem.

The food catalog sorts alternatives by exactly that heuristic — the shortest ingredient list in a category — so you can see what a swap actually looks like.

GreenCheck provides information to help you decide; it is not medical advice. Always read the product label and consult a professional for allergy and medical decisions.