Study Warns: Daily Ultra-Processed Food Intake Raises Heart Disease Risk by 67% Among U.S. Adults

A groundbreaking study published in JACC: Advances has uncovered a stark correlation between ultra-processed food consumption and cardiovascular disease risk in U.S. adults. Researchers analyzed data from 6,814 adults aged 45 to 84—none of whom had preexisting cardiovascular conditions—over a 12-year period. The findings reveal that individuals consuming an average of 9.3 servings of ultra-processed foods daily faced a 67% higher likelihood of experiencing a major cardiovascular event, including heart attacks, strokes, or heart-related deaths, compared to those eating just 1.1 servings per day. These results underscore the growing body of evidence linking industrialized diets to serious long-term health consequences, particularly in a nation where ultra-processed foods make up over 73% of the food supply.

Why Ultra-Processed Foods Are Linked to Elevated Heart Disease Risk

Ultra-processed foods, defined by the Nova classification system as industrial formulations made from substances extracted from foods or synthesized in laboratories, have become a dietary cornerstone in the United States. These foods include commercially produced breads, deli meats, breakfast cereals, frozen pizzas, soft drinks, and candy—items that dominate grocery store shelves and fast-food menus. Unlike whole foods, ultra-processed foods are engineered for convenience and long shelf life, but they often lack essential nutrients while containing high levels of sodium, refined carbohydrates, added sugars, and unhealthy fats.

The Role of Sodium, Sugars, and Unhealthy Fats

Dr. Allen Taylor, chairman of cardiology at MedStar Heart and Vascular Institute, explains that the high sodium content in ultra-processed foods contributes to hypertension, a leading risk factor for heart disease. Meanwhile, refined carbohydrates and added sugars spike blood glucose levels, fostering insulin resistance—a precursor to type 2 diabetes—which further strains the cardiovascular system. "These foods replace healthier options in our diets," Taylor notes, "and their hyper-palatable nature makes overconsumption effortless."

Gut Health and Inflammation: The Hidden Mechanisms

Beyond their nutritional shortcomings, ultra-processed foods may disrupt gut health—a critical but often overlooked factor in cardiovascular wellness. Dr. Minhal Makshood, a cardiologist at MedStar Montgomery Medical Center, points to research suggesting that these foods can alter the gut microbiome, trigger systemic inflammation, and impair gut-brain signaling. "The food processing itself may contribute to inflammation, insulin resistance, cholesterol problems, and hypertension," she says. "These are all pathways that can directly impact heart health over time."

How the Landmark JACC Study Was Conducted

To isolate the impact of ultra-processed foods, researchers relied on self-reported food frequency questionnaires from 6,814 adults enrolled in the Multi-Ethnic Study of Atherosclerosis (MESA). Participants, who were initially free of cardiovascular disease, were tracked for 12 years, with follow-up questionnaires administered intermittently. Medical records were then reviewed to identify cardiovascular events such as heart attacks, strokes, or heart-related deaths. The study adjusted for lifestyle factors like smoking, physical activity, and overall diet quality to ensure the findings reflected the unique risks posed by ultra-processed food consumption.

Quantifying the Risk: From Daily Servings to Health Outcomes

The study’s most alarming statistic is the 67% increase in cardiovascular risk for those consuming nine servings of ultra-processed foods daily compared to those eating just one. But the risk escalates incrementally with each additional serving: participants saw a 5.1% higher risk of cardiovascular events for every daily serving consumed. "This is quite significant," Dr. Makshood emphasizes. "Even small increases in consumption add up over time."

Disparities in Risk: The Impact on Black Americans

The study also revealed a stronger association between ultra-processed food consumption and cardiovascular risk among Black participants. Experts attribute this disparity to systemic inequities in food access, marketing tactics targeting marginalized communities, and the proliferation of food deserts—areas lacking fresh, affordable whole foods. "Targeted marketing of ultra-processed foods in Black communities is a well-documented issue," Dr. Makshood explains. "This underscores the need for policy changes that improve food environments and promote equitable access to healthy eating options."

What Counts as a Serving—and How Easily It Adds Up

While nine servings per day may sound excessive, Dr. Taylor notes that these servings can accumulate quickly in modern eating patterns. A typical day might include a packaged breakfast cereal (1 serving), a flavored yogurt (1 serving), a protein bar (1 serving), a deli sandwich (2 servings), chips (1 serving), and a frozen dinner (2 servings). "Ultra-processed foods are so embedded in our diets that we don’t even recognize them," he says. "The key is awareness—recognizing where these foods appear in your meals and making intentional swaps."

Expert-Recommended Strategies to Reduce Ultra-Processed Food Intake

Both cardiologists emphasize that moderation and incremental change are critical. Dr. Makshood advocates for an 80/20 approach: focusing on whole, minimally processed foods like vegetables, fruits, legumes, fish, and nuts 80% of the time while allowing for occasional indulgences. "Nutrition doesn’t have to be all-or-nothing," she says. "Small, sustainable changes can yield significant long-term benefits."

Simple Substitutions and Mindful Shopping

Dr. Taylor recommends adopting a Mediterranean-style diet, which prioritizes whole foods and minimizes ultra-processed fare. Practical steps include cooking more meals at home, scrutinizing ingredient lists, and opting for minimally processed alternatives. For example, swapping store-bought granola for homemade oatmeal or choosing fresh fruit over packaged snacks can reduce ultra-processed food intake without drastic overhauls.

The Power of Cooking at Home

Cooking at home not only reduces reliance on ultra-processed foods but also allows for better control over ingredients and portion sizes. Studies have shown that individuals who prepare more meals at home tend to have lower rates of obesity, diabetes, and cardiovascular disease. "Even modest changes, like cooking one extra meal per week, can make a difference," Dr. Taylor notes.

Key Takeaways: What the Research Means for Your Heart Health

• Adults consuming nine daily servings of ultra-processed foods face a 67% higher risk of cardiovascular events compared to those eating just one serving.
• Each additional daily serving of ultra-processed food is associated with a 5.1% increase in cardiovascular risk.
• Ultra-processed foods contribute to heart disease through high sodium, refined carbs, added sugars, and unhealthy fats, as well as gut microbiome disruption and inflammation.
• Black Americans appear to be disproportionately affected, likely due to systemic inequities in food access and marketing.
• Small, incremental changes—like cooking at home and focusing on whole foods—can significantly reduce cardiovascular risk over time.

Addressing the Broader Public Health Implications

The findings from the JACC study highlight a critical public health challenge: the ubiquity of ultra-processed foods in the American diet. With over 73% of the U.S. food supply composed of these products, the burden of diet-related diseases—including heart disease, diabetes, and obesity—continues to rise. Public health experts argue that reducing ultra-processed food consumption will require a multi-pronged approach, including policy changes, education campaigns, and industry accountability. "We can’t rely solely on individual behavior change," says Dr. Makshood. "Food environments need to be redesigned to make healthy choices the easier, more affordable option."

Frequently Asked Questions about Ultra-Processed Foods and Heart Health