Ultra Processed Food and Heart Disease: What Research Says

Cardiovascular disease (CVD) is the leading cause of death globally, responsible for an estimated 17.9 million deaths annually according to the World Health Organization^[8]. In the United States alone, heart disease accounts for roughly one in every five deaths, according to CDC data. The established risk factors (high blood pressure, high LDL cholesterol, smoking, diabetes, obesity, and physical inactivity) are well-documented and supported by decades of clinical research.

In recent years, a growing body of epidemiological research has begun examining whether ultra-processed food consumption may represent an additional contributing factor to cardiovascular risk. This research sits alongside the established evidence on traditional risk factors. The studies are primarily observational, meaning they identify statistical associations rather than proving direct causation.

This guide summarizes the current epidemiological evidence linking UPF consumption to cardiovascular outcomes, describes potential biological pathways under investigation, and places these findings in the context of established cardiovascular science. For a broader overview of UPF research across all health outcomes, see our comprehensive health effects guide.

Important context: The research summarized below identifies associations between UPF consumption and cardiovascular outcomes in large populations. These associations do not establish that UPFs directly cause heart disease. Many confounding factors, including overall diet quality, socioeconomic status, and lifestyle habits, may partially explain the observed relationships.

Several large prospective cohort studies have examined the relationship between ultra-processed food consumption and cardiovascular disease outcomes. While each study has limitations, the consistency of findings across different populations and methodologies has drawn significant attention from the cardiology and nutrition research communities.

NutriNet-Sante Cohort (Srour et al., BMJ, 2019)

Participants: 105,159 French adults followed for a median of 5.2 years

Key finding: A 10% increase in the proportion of UPFs in the diet was associated with a 12% higher risk of overall cardiovascular disease (HR 1.12, 95% CI 1.05-1.20), a 13% higher risk of coronary heart disease, and an 11% higher risk of cerebrovascular disease^[1]

Limitation: Self-reported dietary data using 24-hour records; predominantly female participants (79%), which may limit generalizability

Italian Moli-sani Cohort (Bonaccio et al., BMJ, 2021)

Participants: 22,895 Italian adults followed for a median of 12.2 years

Key finding: Participants in the highest quartile of UPF consumption had a 58% higher risk of cardiovascular mortality (HR 1.58, 95% CI 1.23-2.03) and a 26% higher risk of all-cause mortality compared to the lowest quartile^[2]

Limitation: Single dietary assessment at baseline; participants were from a single Italian region, which may not reflect broader dietary patterns

Framingham Offspring Study (Juul et al., JACC, 2021)

Participants: 3,003 adults from the Framingham Offspring Study, followed for a median of 18 years

Key finding: Higher UPF consumption was associated with increased risk of cardiovascular disease mortality, with a dose-response relationship observed across consumption quartiles^[3]

Limitation: Dietary intake based on two 24-hour recalls, which may not capture habitual intake; relatively short follow-up for some participants

UK Biobank Analysis (Chen et al., 2022)

Participants: Over 200,000 UK adults from the UK Biobank prospective cohort

Key finding: Each 10 percentage point increase in UPF calorie intake was associated with a 6% higher risk of cardiovascular disease incidence, with stronger associations observed for cerebrovascular disease^[4]

Limitation: Dietary data from web-based 24-hour recalls completed by a subset of participants; potential healthy volunteer bias in the UK Biobank population

BMJ Umbrella Review of Meta-Analyses (Lane et al., BMJ, 2024)

Scope: Systematic umbrella review pooling 45 meta-analyses covering nearly 10 million participants

Key finding: Rated the evidence linking UPF consumption to cardiovascular disease-related mortality as “convincing,” the highest evidence grade for observational data. Found associations with 32 adverse health outcomes overall^[5]

Limitation: An umbrella review inherits the limitations of its underlying studies; “convincing” observational evidence is not equivalent to causal proof from randomized trials

The following table summarizes key studies examining associations between ultra-processed food consumption and cardiovascular disease. All findings represent observational associations, not established causal relationships.

Interpreting risk estimates: A “12% higher risk” means that in the studied population, the group with higher UPF intake had a relative risk 1.12 times that of the comparison group. This is a modest effect size compared to established risk factors. For comparison, smoking increases cardiovascular disease risk by approximately 200-400%, and uncontrolled high blood pressure increases risk by approximately 100-200%.

Researchers have proposed several biological mechanisms through which ultra-processed food consumption might contribute to cardiovascular risk. These are hypothesized pathways supported by varying degrees of evidence, and the causal chain from UPF consumption to cardiovascular events has not been established.

Sodium and Blood Pressure

Ultra-processed foods contribute an estimated 70% of sodium in the typical American diet, according to CDC data. High sodium intake is an established and well-documented risk factor for hypertension, which in turn is one of the strongest risk factors for cardiovascular disease. This pathway is the most straightforward connection between UPF consumption and cardiovascular risk, not because of ultra-processing per se, but because UPFs happen to be the primary vehicle for excess sodium intake in modern diets.

Evidence level: Established (the sodium-hypertension-CVD pathway is well-documented; UPFs as a sodium source is well-characterized)

Trans Fats and Lipid Profiles

Although the FDA effectively banned partially hydrogenated oils (the primary source of artificial trans fats) in 2018, some ultra-processed foods may still contain small amounts of trans fats. Products can legally be labeled as “0g trans fat” if they contain less than 0.5g per serving. Cumulative intake from multiple servings across multiple products may still reach levels that affect lipid profiles. Trans fats raise LDL cholesterol and lower HDL cholesterol, directly increasing cardiovascular risk.

Evidence level: Established (trans fat cardiovascular effects are proven; residual exposure through UPFs is documented but diminishing)

Added Sugars and Metabolic Effects

Excessive added sugar intake is associated with dyslipidemia (abnormal blood lipid levels), insulin resistance, obesity, and type 2 diabetes^[5], all of which are independent cardiovascular risk factors. Ultra-processed foods are the primary source of added sugars in most Western diets. Sugar-sweetened beverages, in particular, have been consistently linked to cardiovascular outcomes across multiple studies independent of the broader UPF literature.

Evidence level: Strong (the added sugar-metabolic syndrome-CVD pathway is well-supported by clinical evidence)

Saturated Fat Content

Many ultra-processed foods, including processed meats, baked goods, and ready-to-eat meals, are high in saturated fat. While the relationship between saturated fat and cardiovascular disease has been debated in recent years, most major cardiology organizations, including the American Heart Association, continue to recommend limiting saturated fat intake to reduce LDL cholesterol and cardiovascular risk.

Evidence level: Strong (saturated fat and LDL cholesterol relationship is established; role of UPFs as a source is documented)

Inflammatory Effects of Additives

Emerging research^[3][4] is examining whether certain food additives commonly found in ultra-processed products (including emulsifiers, artificial sweeteners, and some preservatives) may promote chronic low-grade inflammation. Chronic inflammation is increasingly recognized as a contributor to atherosclerosis and cardiovascular events. Some animal studies have shown that emulsifiers like polysorbate 80 and carboxymethylcellulose can disrupt the gut microbiome and promote inflammatory responses, but human evidence remains limited. See our ingredients to avoid guide for more detail on specific additives.

Evidence level: Preliminary (plausible mechanism supported by animal models; human evidence is early-stage)

Obesity as a Mediating Factor

The NIH feeding trial (Hall et al., Cell Metabolism, 2019)^[6] demonstrated that ultra-processed diets lead to greater calorie consumption and weight gain compared to unprocessed diets matched for nutrient content. Obesity is one of the strongest modifiable risk factors for cardiovascular disease. It is possible that much of the observed association between UPFs and CVD is mediated through the obesity pathway: UPFs promote weight gain, and weight gain increases cardiovascular risk. This indirect pathway does not diminish the practical relevance of the association, but it does suggest that the mechanism may not involve direct cardiotoxicity of ultra-processed ingredients.

Evidence level: Moderate (obesity-CVD link is established; UPF-obesity link is supported by the NIH RCT; the full mediation pathway is under investigation)

Important note: Several of these pathways (sodium, added sugars, saturated fat) are related to the nutrient content of UPFs rather than ultra-processing itself. A central question in the field is whether ultra-processing confers cardiovascular risk beyond what would be predicted by nutrient composition alone. Some studies have found that associations persist after adjusting for nutrient content^[1], but this remains an active area of investigation.

Understanding how UPF consumption may interact with known cardiovascular risk factors provides context for interpreting the epidemiological evidence. The following table summarizes these potential connections and the strength of available evidence for each.

Key nuance: Many of the connections between UPFs and cardiovascular risk factors are driven by nutrient composition (sodium, sugar, saturated fat) rather than ultra-processing itself. A central unresolved question is whether there are cardiovascular effects of ultra-processing that go beyond what nutrient profiles alone would predict. Some studies suggest yes, but the evidence is not conclusive.

While the research specifically linking UPFs to cardiovascular outcomes continues to develop, major health organizations have issued dietary recommendations that are relevant to this discussion. Notably, these recommendations are based on broader dietary science and are not exclusively driven by the UPF literature.

American Heart Association (AHA)

The AHA's dietary recommendations emphasize consuming a variety of fruits, vegetables, whole grains, lean proteins, nuts, and legumes while limiting added sugars (no more than 6% of total calories), sodium (less than 2,300 mg/day, ideally under 1,500 mg), saturated fat, and alcohol. These recommendations align with reducing many UPFs but are framed around nutrient targets rather than processing level.

In 2024, the AHA introduced a three-tier classification for ultra-processed foods, distinguishing between “industrially processed” foods (highest concern), “less processed” foods, and “minimally processed” foods. This approach acknowledges that not all UPFs are nutritionally equivalent and represents a more nuanced position than a blanket recommendation to avoid all processed foods.

World Health Organization (WHO)

The WHO dietary guidelines recommend limiting free sugars to less than 10% of total energy intake^[9], reducing sodium intake to less than 2 g/day (equivalent to 5 g of salt), and replacing saturated fats with unsaturated fats. The WHO has also highlighted concerns about ultra-processed food consumption in the context of the global obesity epidemic and non-communicable disease burden. Some WHO regional offices have explicitly recommended reducing UPF consumption, though the global guidelines focus primarily on nutrient-level targets.

Evidence-Based Dietary Patterns

The Mediterranean diet and DASH (Dietary Approaches to Stop Hypertension) diet are the most extensively studied dietary patterns for cardiovascular health, with evidence from multiple randomized controlled trials, not just observational studies. Both patterns emphasize whole, minimally processed foods and are naturally low in ultra-processed products. The PREDIMED trial, for example, demonstrated that a Mediterranean diet supplemented with extra-virgin olive oil or nuts reduced cardiovascular events by approximately 30% compared to a control diet^[10]. These dietary patterns align with reducing UPFs, but their evidence base is independent of and stronger than the UPF-specific research. For more context on food classification systems, see our NOVA food classification guide.

Given the current state of the evidence, how should the UPF-cardiovascular research inform practical decisions? The following points aim to place this research in a balanced and actionable context.

1. 1

   Established Risk Factors Come First

   Smoking cessation, blood pressure management, cholesterol management, regular physical activity, and maintaining a healthy weight have far stronger evidence for reducing cardiovascular disease risk than any findings from the UPF literature. These should remain the primary focus of cardiovascular risk reduction. The relative risk increases associated with UPF consumption (6-12% per 10% increase in intake)^[5] are modest compared to the risk increases from smoking (200-400%) or uncontrolled hypertension (100-200%).

2. 2

   Reducing UPFs May Complement Heart-Healthy Eating

   The dietary patterns with the strongest evidence for cardiovascular benefit, the Mediterranean diet and DASH diet, are naturally low in ultra-processed foods. Reducing UPF consumption may be a practical way to move toward these evidence-based patterns, even if the independent cardiovascular effect of reducing processing level remains uncertain. Replacing UPFs with whole foods typically reduces sodium, added sugar, and saturated fat intake simultaneously. See our guide to reducing UPFs for practical strategies.

3. 3

   Not All UPFs Affect Cardiovascular Risk Equally

   Research consistently shows that different UPF subcategories have different associations with cardiovascular outcomes. Sugar-sweetened beverages and processed meats show the strongest negative associations, while whole-grain breads with preservatives show weaker or null associations. A practical approach would prioritize reducing the highest-concern subcategories rather than attempting to eliminate every product classified as ultra-processed. See our food swaps guide for specific alternatives.

4. 4

   Consult Your Cardiologist

   Population-level research describes trends across large groups and cannot predict individual risk. Your personal cardiovascular risk depends on your family history, blood pressure, cholesterol levels, blood sugar, weight, activity level, smoking status, and many other factors. A cardiologist or primary care physician who knows your medical history is the best resource for determining which dietary and lifestyle changes would be most beneficial for your individual situation.

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