What is ultra-processed food?

Ultra-processed food is a category defined by how a food was made, not by how healthy it is. That distinction does most of the work in this article, and it is the one most often lost when the phrase turns up in a headline.

The short version: an ultra-processed food is an industrial formulation, usually made mostly or entirely from substances extracted from foods or synthesised in a laboratory, and typically containing ingredients you would not find in a domestic kitchen. Emulsifiers, humectants, bulking agents, modified starches, colourings and flavourings are the usual markers.

Where the definition comes from

The term belongs to NOVA, a classification developed by a research team led by Carlos Monteiro at the University of São Paulo. NOVA sorts food into four groups by the extent and purpose of the processing applied to it. It is not an acronym, and it is not a scoring system. There is no NOVA number out of one hundred, and no pass mark.

This matters because NOVA is frequently described as though it rated food quality. It does not. It answers one question, which is what was done to this food on the way to the shelf, and it leaves every other question alone. A full account of the four groups is in the NOVA classification explained.

Processed and ultra-processed are different words

Tinned tomatoes are processed. So is cheese, so is bread from a bakery, so is smoked fish. Processing in that sense is ancient and mostly about preservation: heat, salt, smoke, fermentation, time.

Ultra-processing is a different act. It is formulation rather than preservation. The inputs are often not whole foods at all but fractions of them, recombined with additives whose job is texture, shelf life, colour or palatability. A tin of tomatoes is a tomato that has been cooked and sealed. A tomato-flavoured snack is a set of ingredients assembled to taste like one.

So the sentence "I am avoiding processed food" almost never means what it says. Nearly everything in a supermarket is processed to some degree. The narrower category is the one worth being able to see.

What it looks like on a receipt

Definitions are easier to hold onto with a real example. This is a genuine supermarket shop, parsed line by line, with each item placed in a NOVA group from the product name as printed on the till roll.

The interesting part is not the percentage. It is which lines produced it. 5 items out of the food and drink on that receipt account for £11.30, and none of them are unusual. Biscuits, sliced white bread, crisps, a multipack of cola and a multipack of baked beans.

Baked beans are the line that surprises people, and they are a fair illustration of why the category is about formulation rather than virtue. They are also a genuine judgement call, which is the sort of thing this app is careful to admit rather than smooth over.

What the category does not tell you

• It is not a nutrition measure. Two products in the same NOVA group can have very different amounts of salt, sugar or fibre.
• It is not a verdict on any single item. NOVA describes a manufacturing process, not a decision you made in an aisle.
• It is not a target. There is no correct percentage, and Bagged does not set one or compare you to a national average.

That last point is deliberate. A benchmark invites the reader to find out they are better than average and stop paying attention, which is the opposite of useful. The figure that matters is your own, measured the same way each week.

Why a receipt is a good place to measure it

Almost everything in this field relies on self-report. Food diaries are recalled, estimated and quietly edited. Barcode apps see the products you chose to scan, which are rarely the ones you would rather not think about.

A receipt has none of those problems. It is a complete, itemised, timestamped record of what actually entered the house, produced without anyone deciding what to include. It also arrives whether or not you are paying attention, which means the measurement costs one photograph rather than a week of logging.

The trade-off is that a receipt shows a product name and not an ingredients list, so the classification is inferred. That limit is real and Bagged states it on every screen that shows a number.