Everyday Food Preservatives Raise Heart Attack Risk by 16 Percent

Massive Study Links Common Preservatives to Cardiovascular Disease

The bacon on your breakfast plate and the packaged bread in your pantry may be quietly raising your risk of heart attack and stroke. A groundbreaking French study published Wednesday in the European Heart Journal found preservatives used in many store-bought foods to kill bacteria and mold were linked to a 29% greater risk of high blood pressure and a 16% higher risk of heart attack and stroke.

Researchers studying more than 112,000 people over nearly eight years found that higher consumption of preservative food additives was linked to a greater risk of developing high blood pressure and cardiovascular disease, including strokes and heart attacks. By the end of the study, researchers had identified 5,544 new cases of high blood pressure and 2,450 new cases of cardiovascular disease.

What makes this research particularly striking is its scope and methodology. Each participant tracked every bite of their food and drink by brand name for three days every six months. Researchers then used a database of product ingredients to identify common preservatives and compare levels of consumption over years with medical data stored in the French national health care system.

The Surprising Truth About "Natural" Preservatives

Perhaps most shocking was the finding about supposedly healthy additives. Even so-called "natural" antioxidant preservatives used to stop discoloration, such as citric acid and ascorbic acid (widely known as vitamin C), led to a 22% greater risk of high blood pressure in people who ate more foods with those ingredients.

While antioxidants such as citric and ascorbic acid are found naturally in foods such as fruits, they are "not exactly natural" when used as preservatives, senior author Mathilde Touvier said. Ascorbic acid used as a food additive was tied to higher cardiovascular risk, even though vitamin C from natural food sources like fruits and vegetables is generally associated with heart health benefits.

Researchers looked at 17 of the most commonly eaten preservatives and found that eight of these were specifically linked to high blood pressure: potassium sorbate, potassium metabisulphite, sodium nitrite, ascorbic acid, sodium ascorbate, sodium erythorbate, citric acid and extracts of rosemary.

Where These Risky Preservatives Hide

The most concerning preservatives are lurking in everyday foods most people consume regularly. Sodium nitrite is commonly found in bacon, ham, and deli meats; potassium sorbate is used in wine, baked goods, and sauces; and potassium metabisulfite is found in fermented beverages including wine, juice, and cider.

Sodium nitrite, widely used in processed meats like bacon and deli cuts, showed up in more than 73% of participants' diets. Researchers found that 99.5% of the volunteers had consumed at least one food preservative within the first two years of taking part. This near-universal exposure makes the findings particularly relevant for public health.

What This Means for Your Daily Diet

Because this is an observational study, it cannot prove preservatives directly cause these conditions, but researchers say the findings are strong enough to warrant a fresh look at how these additives are regulated. "If confirmed, these new data call for the re-evaluation of regulations governing the use of these additives to improve consumer protection," the study said.

"In the meantime, these findings support existing recommendations to favor non-processed and minimally processed foods, and avoid unnecessary additives," Touvier said. The research adds weight to growing concerns about ultra-processed foods and their impact on long-term health.

This study represents one of the most comprehensive examinations yet of how specific preservative chemicals in branded, packaged products relate to heart health. As food manufacturers continue to extend shelf life and prevent spoilage, consumers may need to weigh convenience against these newly identified cardiovascular risks.