Chicken nuggets, carrots and pasta can make up a balanced meal. One packaged food does not make the whole dinner unhealthy.
A 2026 review drawing on data from more than 8 million people linked higher intake of ultra-processed foods, or UPFs, with increased risks of cardiovascular events, excess weight, metabolic disorders, depression or anxiety, digestive diseases, and death. Each additional 100 grams a day was associated with a 14% higher risk of cardiovascular events and a 3% higher risk of overall mortality. Those are associations. They do not prove that processing caused the outcomes.
A five-ingredient cutoff is only a rule of thumb, not a universal definition of ultra-processed food. Ingredient lists provide clues, but they do not show a product's full nutritional value or establish its health effect.
What the UPF label can and cannot tell you
Experts do not share one definition of UPF. A common rule of thumb flags products with more than five ingredients and at least one component not usually used in home cooking, such as an emulsifier or flavor enhancer. The NOVA classification also looks at why and how a food is made. Experts have noted that similar ingredients and processing can be classified differently, depending on a product's commercial context.
UPFs make up a large share of everyday eating. More than half of the calories consumed in the UK come from them, according to BBC reporting. Yet the category includes foods with very different nutrient profiles. Its label alone cannot tell shoppers whether a particular product is high in protein, low in fiber, or high in added sugar or sodium.
Maeve Hanan of the British Dietetic Association warns that sorting foods into