Ultra-processed foods have become an increasingly important subject in nutrition research. From packaged snacks and ready meals to breakfast cereals and convenience foods, these products have become a familiar part of modern diets.
While much of the discussion has focused on sugar, salt, saturated fat and calorie intake, new research is beginning to explore another possibility: whether the way food is processed may also influence how the body responds to what we eat.
A study highlighted on 4 November 2026 by researchers from University College London and Imperial College London has added another dimension to the discussion. The researchers examined data from more than 6,000 UK adults, looking at blood samples and dietary information to identify patterns of molecules known as metabolites.
Metabolites are small molecules produced when the body breaks down food and carries out its normal chemical processes. They can provide useful information about how the body is responding to different dietary patterns.
The researchers identified distinct metabolic patterns associated with diets higher in ultra-processed foods and those containing more minimally processed foods. People consuming more ultra-processed foods tended to have lower levels of certain beneficial fats, including omega-3 fatty acids, alongside less favourable patterns of blood fats. Those eating more minimally processed foods showed the opposite pattern.
The findings suggest that the relationship between food processing and health may involve more than the nutritional content traditionally highlighted on food labels.
The research also examined the relationship between these metabolic patterns and longer-term health. Over the study period, people with the highest intake of ultra-processed foods had a 17% higher risk of developing cardiovascular disease than those with the lowest intake.
The researchers found that the metabolic patterns associated with ultra-processed foods accounted for approximately 51% of the observed relationship with cardiovascular disease and 43% of the relationship with type 2 diabetes.
Although these findings are interesting, they do not establish that food processing itself causes disease. The study was observational, meaning it identified associations rather than proving cause and effect. Nevertheless, it provides another reason to examine how dietary patterns may influence long-term health.
Despite growing concerns, researchers are also highlighting the importance of looking beyond food classifications. A separate study from the University of Gothenburg, published in October 2026 and highlighted by the university on 2 November, examined ultra-processed food consumption in Sweden and the challenges associated with classifying foods using the NOVA system.
The researchers found that the classification can include a wide range of products, some of which have very different nutritional qualities. For example, certain iron-fortified cereal-based foods for young children may be classified as ultra-processed, despite providing useful nutrients.
This highlights an important distinction. A food's processing category does not necessarily tell us everything about its nutritional value. It also reinforces the importance of looking at the overall quality of a diet rather than judging individual foods by their classification alone.
For most people, improving dietary quality does not require complicated food rules or avoiding every packaged product. A more practical approach is to build meals around foods that provide fibre, vitamins, minerals, protein and healthy fats.
Vegetables, fruit, beans, lentils, whole grains, nuts, seeds and other minimally processed foods can all contribute to a balanced diet. Where convenience foods are useful, checking nutritional labels can help identify products that are lower in salt, added sugars and saturated fat, while providing useful nutrients.
Fortified foods can also have a place in a healthy diet, particularly where they help people meet their nutritional requirements.
The latest research adds to an evolving understanding of how food affects the body. Rather than focusing exclusively on individual nutrients, researchers are beginning to examine how dietary patterns, food processing and metabolism may work together to influence long-term health.
There is still more to understand, and further research will be needed before scientists can establish precisely how much processing itself contributes to disease risk.
For now, the most sensible approach remains a balanced one: eating a varied diet, including plenty of fibre-rich and minimally processed foods, while making informed choices about the convenience foods we include.
Ultimately, healthy eating is not about achieving perfection. It is about making realistic choices that support our health over time.
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