Tejal Somvanshi
A large meta-analysis published this month found that each additional 100 grams per day of ultra-processed food intake was associated with a 14% higher hazard of cardiovascular events. The research pooled data from nearly 9 million adults. Before that number gets misread, here is exactly what it means — and what it does not.
What the study found
The research, published in the BMJ's Family Medicine and Community Health journal on September 22, analysed data from 8,819,894 adults drawn from 51 prospective cohort studies across multiple countries. It is a dose-response meta-analysis — meaning it looked at whether the association between UPF consumption and health outcomes changed as intake went up.
Per each additional 100 grams per day of ultra-processed food:
- Cardiovascular events: 14% higher associated hazard
- Cancer: 4% higher associated hazard
- All-cause mortality: 3% higher associated hazard
- Metabolic syndrome and diabetes: 2% higher associated hazard
The study's DOI is 10.1136/fmch-2026-003925.
What 14% actually means here
That figure is a population-level association from observational data. It does not mean your personal risk of a heart attack rises by exactly 14% if you eat more ultra-processed food. There is no clinical test that can turn this association into an individual prediction.
The research is a meta-analysis of prospective cohort studies — a design that tracks groups of people over time and looks for patterns, rather than one that randomly assigns people to eat specific diets and measures outcomes. That means the study can identify a consistent association across a large population, but it cannot rule out that people who eat more ultra-processed food also differ from those who eat less in other ways that affect their heart health.
The researchers themselves acknowledge dietary-assessment limitations and residual confounding as important caveats. EurekAlert! reported these qualifications alongside the headline findings.
What ultra-processed food actually includes
Ultra-processed food is defined by the NOVA classification system, which groups foods by the degree to which they have been processed industrially. Products in the ultra-processed category include mass-produced bread, packaged snacks, flavoured yoghurts, ready meals, soft drinks, and reconstituted meat products. The category includes a wide range of products — some consumed in small amounts, some forming a large part of many people's diets.
For context on how to assess your own ultra-processed food consumption, existing dietary guidance offers practical approaches.
How strong is the evidence overall
The analysis is large, involving nearly 9 million people across 51 studies, with dose-response associations across several disease categories. The authors themselves rated the evidence as low or moderate certainty, which is an important qualification.
At the same time, observational studies on dietary habits are among the most methodologically challenging in medicine. People who eat fewer ultra-processed foods typically differ from heavy consumers in income, education, access to fresh food, and other health behaviours. Separating the effect of UPF from those confounding factors is a recognised limitation. Dietary research methods and why association does not equal causation is worth understanding if you are trying to apply this research to your own eating habits.
What the bottom line looks like
Across a population of nearly 9 million adults, people who ate more ultra-processed food showed consistently higher associated rates of cardiovascular events, cancer, and all-cause mortality. The association strengthened as intake rose, which is what a dose-response relationship means. That is a meaningful finding at a population scale, though the authors rate the certainty of evidence as low or moderate.
It is not a guarantee that reducing your UPF consumption will cut your personal heart-attack risk by 14%. But this study adds to observational evidence associating higher UPF intake with several chronic health outcomes.
