The danger may not just be the salt shaker. A massive new study found that people who consumed the most common food preservatives had higher rates of high blood pressure, heart disease, stroke, and angina — raising fresh questions about what is hiding in everyday packaged foods.academic.oup+1
Before you swear off every item in your pantry, here is the crucial point: the study found an association, not proof that preservatives directly caused heart disease. But the numbers were strong enough that researchers say food-safety regulators should take a closer look.
The preservative problem
Researchers analyzed dietary records and health outcomes from 112,395 adults in the long-running French NutriNet-Santé study. Participants repeatedly reported what they ate and drank, allowing researchers to track specific additives instead of simply labeling an entire diet “healthy” or “unhealthy.” They were followed for an average of seven to eight years.
Nearly everyone had exposure to preservatives. In the first two years alone, 99.5% of participants consumed at least one preservative additive. That is not surprising, given how common these chemicals are in supermarket staples: packaged breads, cured meats, breakfast cereals, frozen meals, soda, energy drinks, snack foods, desserts, and ready-to-eat meals.
The biggest red flags
People with the highest intake of non-antioxidant preservatives had a 29% higher risk of developing hypertension and a 16% higher risk of cardiovascular disease than those with the lowest intake. Cardiovascular disease in this study included conditions such as heart attack, stroke, and angina.
People who consumed the highest levels of antioxidant preservatives had a 22% higher risk of hypertension. These preservatives are often used to prevent food from browning, losing color, or going rancid.
The study examined 17 individual preservatives commonly consumed by at least 10% of participants. Eight were associated with a higher incidence of high blood pressure:
Potassium sorbate (E202)
Potassium metabisulphite (E224)
Sodium nitrite (E250)
Ascorbic acid (E300)
Sodium ascorbate (E301)
Sodium erythorbate (E316)
Citric acid (E330)
Rosemary extract (E392)escardio+1
Ascorbic acid—vitamin C when it occurs naturally in fruits and vegetables—was also associated in this analysis with a higher incidence of cardiovascular disease when consumed as a preservative additive. That finding does not mean that oranges, berries, or vitamin C-rich foods harm the heart. It also does not prove that taking vitamin C supplements causes heart disease. It reflects an association involving additive exposure in the larger dietary patterns of this study.
Why the study matters
Preservatives help packaged foods last longer and help prevent mold or bacterial growth. They are not all interchangeable, and they are not necessarily dangerous in every amount or for every person.
But the new research adds to a larger concern: highly processed diets may affect health in ways that go beyond total calories, fat, sugar, or sodium. Researchers adjusted for many factors that influence heart health, including diet quality, lifestyle, and socioeconomic factors, yet the association remained.
Scientists are still investigating why. Laboratory research suggests certain preservatives could affect oxidative stress, metabolism, inflammation, or the gut microbiome. Those are plausible pathways, but they are not proven explanations for what happened in this population study.
What to do without panicking
You do not need to memorize every E-number or throw out your entire kitchen. The practical goal is to shift your overall eating pattern.
Eat more foods that look close to how they were grown or raised: vegetables, fruit, beans, nuts, eggs, fish, poultry, plain yogurt, and whole grains.
Make packaged food a convenience, not the foundation of every meal.
Check ingredient lists on foods you buy regularly, especially processed meats, bottled sauces, packaged bread, snacks, soda, frozen meals, and shelf-stable desserts.
When possible, choose shorter ingredient lists and foods with fewer additives.
Do not assume “natural” means additive-free. Citric acid, ascorbic acid, and rosemary extract can all be used as preservatives.
If you have high blood pressure, focus on the proven basics: take prescribed medication, limit sodium, stay physically active, maintain a weight that supports your health, avoid smoking, and work with your clinician.
No one preservative determines your future. But if ultra-processed foods make up a large portion of your diet, this research gives you another reason to rethink what ends up in your cart.
This article is for educational purposes only and is not medical advice. The study was observational, meaning it cannot prove that preservative additives directly cause high blood pressure, heart disease, heart attack, or stroke. Do not stop prescribed medication or make major dietary changes without discussing your individual health needs with a qualified healthcare professional.
