People who regularly eat ultra-processed foods face a sharply elevated risk of heart attack and stroke, according to a new science advisory from the American Heart Association. The advisory, published in Circulation, synthesized evidence across multiple studies and found that high consumption of these products was tied to a 67 percent higher risk of major cardiovascular events. The finding arrives as ultra-processed items account for more than half of daily calories in many Western diets, placing the connection between industrial food production and heart disease at the center of an urgent public health debate.
Why the 67 percent risk figure demands attention now
The AHA advisory does not describe a marginal statistical bump. A 67 percent increase in the likelihood of heart attack or stroke, drawn from pooled observational data, represents a risk elevation comparable in magnitude to several well-established cardiovascular threats. The scale of exposure compounds the concern: packaged snacks, sugary drinks, instant noodles, and reconstituted meat products dominate grocery aisles and fast-food menus across the United States and Europe, meaning even small individual risks can translate into large numbers of excess events at the population level.
One question gaining traction among researchers and regulators is whether front-of-package warning labels on ultra-processed foods could reduce population-level heart disease within a few years. The logic follows the tobacco model, where graphic warnings contributed to measurable declines in smoking rates. If applied to food, such labels could theoretically produce detectable drops in hospital admissions for heart attacks and strokes, tracked through national discharge databases and insurance claims. The challenge is isolating the effect of labeling from broader dietary trends, income shifts, marketing changes, and evolving norms around home cooking. No country has yet run a controlled trial large enough to answer that question, and the AHA advisory itself stops short of endorsing a specific labeling policy, instead calling for more rigorous evaluation of real-world interventions.
Regulatory interest is building in parallel. France’s national food safety agency, ANSES, has issued its own opinion on ultra-processed foods and health, a document cited in an open-access review in npj Metabolic Health and Disease that maps the path from scientific evidence to policy action. That review frames the current moment as a gap between what the data shows and what governments have done about it. Dietary guidelines in most countries still focus on nutrient composition-fat, sugar, salt-rather than the degree of industrial processing a food has undergone, leaving consumers with little guidance on how to interpret the growing body of research around processing itself.
How the AHA advisory built its cardiovascular case
The advisory, formally titled “Ultraprocessed Foods and Their Association With Cardiometabolic Health: Evidence, Gaps, and Opportunities,” was indexed on PubMed and published in Circulation, the AHA’s flagship journal. It reviewed a body of epidemiological research linking ultra-processed food consumption to higher rates of coronary heart disease, stroke, type 2 diabetes, obesity, and metabolic syndrome. The authors highlighted consistent associations across diverse populations and study designs, strengthening the case that the connection is not an artifact of a single dataset or regional dietary pattern.
Ultra-processed foods, as defined by the NOVA classification system used in most of the cited research, are products that contain ingredients rarely found in home kitchens: hydrogenated oils, high-fructose corn syrup, emulsifiers, artificial flavors, colorants, and preservatives. These foods are typically manufactured through multiple industrial steps, with the goal of maximizing shelf life, palatability, and convenience. Examples range from sweetened breakfast cereals and packaged cookies to flavored yogurts, processed meats, and many frozen ready meals.
The AHA advisory pointed to several biological pathways through which these products may damage the cardiovascular system. Excess sodium and added sugars raise blood pressure and promote insulin resistance, both key drivers of heart disease. Certain additives may alter the gut microbiome or trigger chronic low-grade inflammation, which accelerates plaque buildup in arteries. High caloric density paired with low satiety can drive overeating, fueling weight gain and central obesity. Over time, these mechanisms converge on a familiar cluster of risk factors: higher blood pressure, elevated blood lipids, impaired glucose control, and increased body mass index.
The full advisory also acknowledged that not all ultra-processed foods carry identical risk profiles. Whole-grain breads with added preservatives, for instance, differ meaningfully from sugar-laden breakfast cereals or processed deli meats high in saturated fat and sodium. That heterogeneity complicates blanket policy recommendations and has fueled debate among nutrition scientists about whether the NOVA framework is too blunt an instrument for regulatory use. Some experts argue for a more nuanced approach that distinguishes between minimally reformulated staples and highly engineered products designed primarily for taste and shelf stability.
Gaps in the evidence and what to watch next
The AHA advisory is explicit about what it does not know. Nearly all of the supporting evidence comes from observational studies, which can identify associations but cannot prove that ultra-processed foods directly cause heart attacks and strokes. People who eat more ultra-processed foods may differ in many other ways-from income and education to physical activity and smoking-that are difficult to fully adjust for in statistical models. Randomized controlled trials, the gold standard for establishing causation, are challenging to conduct over the years or decades needed to track cardiovascular outcomes.
One small crossover trial by the National Institutes of Health, often cited in discussions of ultra-processed diets, showed that participants eating ultra-processed meals consumed roughly 500 more calories per day than those on unprocessed diets, and gained weight over just two weeks. But that study was designed to measure short-term intake and energy balance, not long-term disease events. It suggests a plausible pathway-greater calorie consumption leading to obesity and related cardiometabolic problems-without directly documenting heart attacks or strokes.
Specific quantitative thresholds also remain elusive. The 67 percent risk figure is drawn from secondary citations within the advisory rather than from a single large trial registry with publicly available participant-level data. Researchers have not established a clear dose-response curve that identifies, for example, how many daily servings of ultra-processed food push cardiovascular risk from moderate to high, or whether occasional consumption in an otherwise minimally processed diet carries meaningful harm. Without that granularity, public health messaging risks being either too vague to change behavior or too rigid to reflect the actual science.
Regulatory responses are fragmented. While France’s ANSES has weighed in, and several countries in Latin America have experimented with front-of-pack labels that indirectly penalize ultra-processed products high in sugar, salt, or fat, no major jurisdiction has yet built a comprehensive policy framework explicitly targeting processing level. In many places, reformulation efforts have focused on reducing specific nutrients of concern-such as trans fats or sodium-without addressing the broader pattern of reliance on industrially manufactured, hyper-palatable foods.
For now, the AHA advisory stops short of calling for bans or sweeping restrictions. Instead, it urges clinicians to discuss ultra-processed foods with patients as part of broader dietary counseling, and it encourages policymakers to support research that can clarify both mechanisms and effective interventions. That includes long-term cohort studies with better measurement of food processing, pragmatic trials testing labeling or taxation strategies, and mechanistic work on how additives and formulation patterns influence inflammation, metabolism, and vascular health.
For individuals trying to act on the emerging evidence, the advisory’s implications are relatively straightforward even amid uncertainty. Replacing ultra-processed items with minimally processed alternatives-fresh or frozen vegetables, whole fruits, legumes, nuts, plain dairy, and whole grains-aligns with existing heart-healthy recommendations and is unlikely to cause harm. The more difficult task falls to governments and industry, which must decide whether to treat ultra-processed foods as a central cardiovascular risk factor requiring structural responses, or as a secondary concern behind traditional nutrient targets. The AHA’s message is that the stakes are high enough, and the associations strong enough, that inaction now carries its own risk.
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*This article was researched with the help of AI, with human editors creating the final content.
