A major new analysis of data from a large, racially diverse cohort in the United States links frequent consumption of ultra-processed foods with a substantially higher risk of major cardiovascular events.
The findings add weight to growing evidence that how food is processed matters for heart health, independent of calorie intake and traditional risk factors.
Researchers analysed dietary information from 6,814 adults aged 45–84 who took part in the Multi-Ethnic Study of Atherosclerosis (MESA). Participants did not have known heart disease at baseline. Using a standard classification system to group foods by processing level, investigators estimated each person’s usual daily servings of ultra-processed products. These include many ready-to-eat, packaged and convenience items such as chips, frozen ready meals, processed meats, sugary drinks, breakfast cereals and many mass-produced breads.
The contrast between high and low consumers was stark. People in the highest fifth of intake averaged about 9.3 servings of ultra-processed foods a day. Those in the lowest fifth averaged roughly 1.1 servings.
Over the follow-up period, the high-intake group faced a 67% greater likelihood of suffering a major cardiovascular outcome — defined as death from coronary heart disease or stroke, a non-fatal heart attack or stroke, or a resuscitated cardiac arrest — compared with the low-intake group.
Risk rose with each extra daily serving. On average, every additional serving of ultra-processed food was associated with a 5.1% increase in the risk of a major cardiac event. The investigators point to structural and environmental factors, such as targeted marketing and limited access to less-processed foods in some neighbourhoods, as likely contributors to the observed racial differences in consumption and associated risk.
These results were presented at a major cardiology meeting and published concurrently in a peer-reviewed cardiovascular journal JACC Advances. The study is among the first large-scale assessments of ultra-processed food intake and cardiovascular outcomes in the US cohort chosen specifically for its racial and ethnic diversity.
Its conclusions broadly echo those reached by several European studies while extending relevance to the US population and other populations.
Importantly, the association between ultra-processed foods and cardiovascular outcomes persisted after extensive adjustment. The analysis controlled not only for calorie intake and measures of overall diet quality but also for common cardiovascular risk factors such as diabetes, hypertension, elevated cholesterol and obesity.
In other words, the link between ultra-processed food consumption and higher heart-disease risk was not simply due to greater calorie consumption or a generally poor diet among high consumers.
That observation raises the question of mechanism. The present study was epidemiological; it did not investigate biological pathways. Nonetheless, existing research offers plausible explanations. Ultra-processed foods tend to have high energy density and contain added sugars and fats. They often produce weak satiety signals (feeling full), encouraging overconsumption.
Regular intake can drive weight gain, promote inflammation, and increase visceral fat accumulation — all established contributors to cardiovascular disease. Food additives, altered nutrient matrices and the impact of processing on the gut microbiome are additional hypotheses under active investigation.
Despite the careful analysis, the researchers acknowledge several limitations. Dietary data were collected using questionnaires that rely on self-report. Such measures are vulnerable to recall bias and misclassification. The parent study was not designed solely to capture ultra-processed food intake, and the assessment quantified consumption in servings rather than at the level of individual food items. Residual confounding remains possible, as with all observational studies.
Thus, while the association is strong and consistent with prior work, causality cannot be established from these data alone.
The public-health implications, however, are clear and immediate. Ultra-processed foods are ubiquitous, inexpensive, convenient and heavily marketed. They also appear to carry cardiovascular risk beyond what would be expected from their nutrient profiles alone. For clinicians, public health professionals and consumers, that signals an additional dimension to dietary advice: attention to the degree of processing, not only to macronutrients and calorie counts.
Practical steps to reduce exposure are straightforward. Increase the proportion of meals based on minimally processed foods: vegetables, fruits, legumes, whole grains, nuts and seeds. Choose plain, single-ingredient items that require minimal preparation. When buying packaged products, read nutrition labels to compare added sugars, salt and saturated fat. Prefer items with fewer ingredients and avoid those with long lists of additives, emulsifiers or unfamiliar chemical names. Preparing more meals at home, when feasible, also tends to reduce reliance on highly processed options.
Researchers and professional societies have advocated for standardised front-of-package labelling so consumers can more easily identify healthier choices at a glance. Such labelling has been endorsed by a concise clinical guidance report published by a leading cardiology organisation and official governmental sites. Label transparency, combined with regulation of targeted marketing and improved access to whole and minimally processed foods in underserved neighbourhoods, could help reduce intake of potentially harmful products and narrow health disparities.
Addressing excess consumption of ultra-processed foods therefore requires action beyond individual behaviour change. Interventions must consider affordability, accessibility and cultural relevance to be effective and equitable.
Clinicians can integrate these insights into routine practice. Simple screening questions about the frequency of consumption of packaged snacks, sugary beverages and convenience meals can flag patients at higher risk. Advising patients to swap one ultra-processed item per day for a minimally processed alternative could have measurable benefits at the population level. Public health campaigns that focus on swapping rather than deprivation may resonate better and achieve greater uptake.
For researchers, the findings open avenues for further inquiry. Randomised trials that test the effects of reducing ultra-processed food intake on hard cardiovascular endpoints would be ideal but challenging and costly. Shorter-term mechanistic trials could examine changes in inflammation, insulin sensitivity, visceral adiposity and gut microbiota when participants switch to less-processed diets. Longitudinal studies that combine objective measures — such as grocery purchase data or biomarkers of food processing — with clinical outcomes could help refine causal inference.
The study helps to crystallise a modern nutritional hazard. The rise of highly processed, ultra-palatable foods over recent decades has paralleled increases in obesity and cardiometabolic diseases. This research reinforces the principle that industrial food processing is not neutral for health. It is a modifiable exposure. Reducing population-level intake of ultra-processed foods could be a feasible and effective strategy to lower cardiovascular risk.
For individuals, the takeaway is pragmatic. Moderation of ultra-processed foods matters. Replace a packaged snack with fresh fruit. Swap a ready meal for a simple home-cooked dish with whole ingredients. Choose plain yoghurt and add your own fruit, rather than pre-sweetened flavoured varieties. Such small, sustainable changes can accumulate into meaningful reductions in risk over time.
The evidence from this large, diverse cohort adds urgency to broader policy debates about food systems, marketing and health equity. It also delivers a straightforward message for patients and clinicians: the less processed the food, the better the heart.
The nuances of nutrient composition still matter. But processing appears to exert an independent influence that deserves attention in dietary guidelines, clinical counselling and public-health strategy.
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