Do Food Preservatives Increase Your Risk of Heart Disease

Food Preservatives and Cardiovascular Risk: What the Research Shows

Packaged processed foods containing common preservatives linked to increased cardiovascular risk

Eating high amounts of common food preservatives was linked to a 29% higher risk of hypertension and a 16% higher risk of heart disease

Food preservatives are everywhere. They line the ingredient lists of packaged breads, deli meats, sauces, snacks, and drinks, quietly extending shelf life and preventing spoilage. Most people consume them without a second thought. But a large-scale French study has raised new questions about what these additives might be doing to our cardiovascular health over the long term. Published in the European Heart Journal, the research followed more than 112,000 people for nearly eight years and found meaningful links between preservative intake and the risk of high blood pressure and heart disease. Here is what the study found, what it means, and how to think about it in the context of everyday eating.

An Eight-Year Study of Over 112,000 People

The research was conducted by scientists at Inserm (the French National Institute of Health and Medical Research), in collaboration with Université Sorbonne Paris Nord and Université Paris Cité, using data from the long-running NutriNet-Santé cohort. Between 2009 and 2024, 112,395 volunteers in France recorded their diets in detail through repeated 24-hour dietary records, which allowed researchers to track exposure to specific food additives, including the exact commercial brands consumed. Participants were then followed for a median of 7.9 years, with health outcomes verified through medical and insurance records.

This design makes the study one of the most detailed investigations to date into how real-world preservative consumption relates to cardiovascular health, since it captured not just whether people ate processed foods, but which specific preservative compounds they were exposed to, and how much.

Two Categories of Preservatives, Two Different Findings

Researchers grouped the preservatives studied into two broad categories: non-antioxidant preservatives, which are mainly used to prevent microbial growth and spoilage, and antioxidant preservatives, which are used to prevent fats from turning rancid and to help foods retain their color.

People with the highest intake of non-antioxidant preservatives had a 29 percent higher risk of developing hypertension and a 16 percent higher risk of cardiovascular disease, compared with those who consumed the least. Cardiovascular disease in this context includes conditions such as heart attack, stroke, and angina.

Antioxidant preservatives told a related but distinct story. People with the highest intake of these compounds had a 22 percent higher risk of hypertension, although no significant link to overall cardiovascular disease was found for this category as a whole.

Eight Specific Additives Under Scrutiny

Nearly all participants, 99.5 percent, had consumed at least one food preservative within just the first two years of the study, underlining how widespread these substances are in the modern food supply. Among the 17 most commonly consumed preservatives, each eaten regularly by at least 10 percent of participants, eight were individually associated with a higher risk of hypertension:

Potassium sorbate
Potassium metabisulfite
Sodium nitrite
Ascorbic acid
Sodium ascorbate
Sodium erythorbate
Citric acid
Rosemary extract

One compound stood out in particular: ascorbic acid, better known as a form of vitamin C when used as a nutrient, was also individually linked to a higher risk of cardiovascular disease when used as a food additive. This distinction matters, since ascorbic acid used as a preservative in industrial food processing is not the same context as vitamin C obtained from fruits, vegetables, or supplements taken for nutritional purposes.

Why This Matters for Everyday Eating

These findings do not mean that any single food containing a preservative is dangerous on its own. Rather, they point to a cumulative pattern: people who regularly and heavily consume ultra-processed foods tend to have higher long-term exposure to these compounds, and that pattern of exposure appears to track with higher cardiovascular risk over time.

The study's authors have called for a re-evaluation of the regulatory safety limits set for these additives, noting that consumers are exposed to them through thousands of different food and drink products, often without realizing how frequently the same preservative appears across their diet.

Practical Takeaways

Based on this research and broader public health guidance, a few practical steps can help reduce unnecessary preservative exposure without requiring drastic dietary changes:

Favor fresh, minimally processed foods such as fruits, vegetables, whole grains, and unprocessed proteins as the foundation of most meals.
Read ingredient labels and take note when the same preservative names appear repeatedly across the products in your shopping cart.
Cook at home more often, which naturally limits reliance on shelf-stable, heavily preserved ingredients.
Treat highly processed, long-shelf-life products as occasional additions rather than daily staples.
Keep an eye on overall dietary patterns rather than fixating on any single ingredient, since cardiovascular health is shaped by many interacting factors, including physical activity, sleep, and overall diet quality.

A note on interpretation: This was an observational study, which means it identifies associations rather than proving direct cause and effect. The authors themselves note that these findings need to be confirmed by further research before firm conclusions can be drawn about individual preservatives. As with most nutrition science, the most reliable guidance remains consistent with long-standing public health recommendations: build meals around whole, minimally processed foods, and limit regular reliance on ultra-processed products.

The Bottom Line

This large, carefully designed French cohort study adds meaningful weight to a growing body of evidence connecting ultra-processed food consumption with cardiovascular risk. While food preservatives serve a real purpose in keeping food safe and reducing waste, this research suggests that regularly consuming high levels of certain preservative compounds, particularly non-antioxidant preservatives such as sodium nitrite and potassium sorbate, may be associated with meaningfully higher risks of hypertension and heart disease over time. Shifting the balance of your diet toward fresh, whole foods remains one of the simplest and most evidence-backed ways to support long-term heart health.

ZenHealthTips