Understanding the 'Ultra-Processed' Label
First, let's revisit what 'ultra-processed' means. The term comes from the NOVA classification system, developed over a decade ago. It categorises foods based on their level of industrial processing. Unprocessed foods are things like fresh fruits and
vegetables. Processed foods have been altered, like canned beans or cheese. Then there's Group 4: ultra-processed foods. These are industrial formulations, typically made with ingredients you wouldn't find in a home kitchen—think protein isolates, emulsifiers, and artificial flavours. Examples range from fizzy drinks and packaged cookies to instant noodles and many ready-to-eat meals. This classification has been incredibly influential, linking high UPF consumption in numerous studies to an increased risk of obesity, type 2 diabetes, and heart disease.
Cracks in the Consensus
Despite the strong evidence linking UPF-heavy diets to poor health, a growing number of scientists are questioning if the NOVA classification is too blunt a tool. The core criticism is that the 'ultra-processed' category is incredibly broad, lumping together foods with vastly different nutritional profiles. For example, a fibre-rich whole-grain breakfast cereal that has been extruded (a form of processing) can fall into the same category as a sugary doughnut. A sugar-free drink and a soft drink loaded with high-fructose corn syrup might both be classified as UPFs. This has led experts to argue that the focus on 'processing' can be misleading and distracts from what might be the real issue: the overall nutritional quality of the food.
Formulation vs. Processing
This brings us to the heart of the new debate: is it the industrial process itself that harms us, or the formulation of the final product? Many UPFs are formulated to be hyper-palatable—packed with high levels of added sugar, salt, and unhealthy fats—and low in beneficial nutrients like fibre and protein. These characteristics are known to drive overconsumption and are independently linked to chronic diseases. Some studies suggest that when you account for this poor nutritional profile, the link to harm from 'processing' weakens. However, other recent research from 2026 suggests that even after adjusting for nutrients like sugar and salt, UPFs are still linked to worse health outcomes, hinting that other factors are at play.
What Else Could Be the Problem?
If it's not just sugar and salt, what else could be contributing to the health risks of UPFs? Researchers are investigating several possibilities. The industrial processing itself can destroy the food's natural cellular structure, which can make us absorb calories more quickly. The process can also strip away beneficial compounds like vitamins and antioxidants. Furthermore, there is growing concern about the cocktail of additives—emulsifiers, stabilisers, and artificial sweeteners—and their long-term impact on our gut microbiome and overall health. Chemicals from packaging are another area of active investigation. The reality is likely a combination of all these factors: a poor nutritional profile made worse by the effects of industrial processing and additives.
A Smarter Way to Read the Aisles
So, how should this evolving debate change the way we shop and eat? The takeaway isn't that all packaged foods are suddenly fine. Instead, it's about moving beyond the single 'ultra-processed' label and becoming a more discerning consumer. Blanket avoidance of all UPFs might not be practical or even desirable, as some fortified foods or whole-grain products can be part of a healthy diet. The key is to read the label. Look past the front-of-pack marketing and check the nutrition facts panel for high levels of sodium, added sugars, and saturated fat. Scan the ingredients list. If it's long and full of substances you don't recognise, it's a sign that the food is heavily formulated and likely less nutritious.
