High blood pressure, heart attacks linked to common preservatives in food
High Blood Pressure, Heart Attacks Linked to Common Preservatives in Food
High blood pressure heart attacks linked – A new study conducted in France has uncovered a significant correlation between certain food preservatives and an increased risk of cardiovascular issues, including elevated blood pressure and heart attacks. Researchers found that individuals consuming foods with specific preservatives experienced a 29% higher likelihood of developing hypertension and a 16% greater chance of suffering from strokes or heart-related events. The findings, published in the European Heart Journal, suggest that even naturally derived preservatives, such as citric acid and ascorbic acid, may contribute to these health risks when added to processed foods.
Preservatives and Their Health Impacts
While antioxidants like citric and ascorbic acid are naturally present in fruits and vegetables, their use as food additives may alter their effects on the body, according to Mathilde Touvier, senior author of the research. In an email, Touvier, who leads the NutriNet-Santé study, noted that “naturally occurring ascorbic acid and added ascorbic acid—whether chemically produced or extracted—could have distinct health implications.” She emphasized that the study’s results apply specifically to food additives, not to the natural forms found in whole foods.
“Naturally occurring ascorbic acid and added ascorbic acid — which may be chemically manufactured — may have different impacts on health,” said Touvier, who is also director of research at France’s National Institute of Health and Medical Research in Paris. “Thus, the results observed here for these food additives are not true for natural substances found in fruits and vegetables.”
The research highlights how preservatives in ultraprocessed foods, or UPFs, might independently influence cardiovascular health. These findings align with recent statements from Tracy Parker, a nutrition lead at the British Heart Foundation in London, who noted that “this study echoes the recent European Society of Cardiology consensus, which identifies UPFs as a major public health concern.” Parker, who was not involved in the research, added that the study provides valuable insights into the role of individual preservatives rather than treating UPFs as a single category.
Ultraprocessed Foods and Their Health Risks
Ultraprocessed foods have long been associated with various health issues, including a 50% elevated risk of cardiovascular-related mortality. Additionally, they are linked to a 55% increased likelihood of obesity, a 41% higher chance of sleep disorders, and a 40% greater risk of developing type 2 diabetes. These conditions are interconnected and collectively contribute to poor heart health. The study further supports the notion that UPFs are more harmful than their nutrient composition alone might suggest, shedding light on previously overlooked factors.
Researchers analyzed the dietary habits of over 112,000 individuals aged 15 and older, all participants in the NutriNet-Santé study, which has been tracking French volunteers since 2009. Participants record every meal and drink, including brand names, for three days every six months. This detailed approach allows scientists to cross-reference ingredient data with health records from the French national healthcare system, creating a comprehensive view of preservative consumption and its effects over time.
Among the 58 preservatives examined, 17 were identified as being consumed by at least 10% of participants. The study revealed that eight of these preservatives were associated with a heightened risk of hypertension in the following decade. Notably, three preservatives—potassium sorbate, potassium metabisulphite, and sodium nitrite—were classified as non-antioxidant, meaning they primarily target bacteria, molds, and yeasts in food preservation.
“This is one of the first large studies to look at individual preservatives rather than treating ultra-processed foods as a single category,” Parker said. “UPFs have long raised concerns due to their high levels of sugar, salt, and fat, but these factors alone have never fully explained why they appear more harmful than their nutrient profile suggests. These findings help fill part of that gap.”
Preservatives in Everyday Foods
These preservatives are commonly found in everyday products. Potassium sorbate, for instance, is frequently used in wine, baked goods, cheeses, and sauces. Potassium metabisulphite, which releases sulfur dioxide when dissolved, appears in wine, fruit juices, cider, beer, and other fermented beverages. Sodium nitrite, a chemical salt, is prevalent in processed meats such as bacon, ham, and deli meats. These additives, while effective in extending shelf life, may now be scrutinized for their role in cardiovascular disease.
Interestingly, the study revealed that ultraprocessed foods account for only 35% of the preservatives consumed by participants. This statistic underscores the ubiquity of preservatives in the modern diet, with many non-ultraprocessed items also containing these additives. Lead author Anaïs Hasenböhler, a doctoral student at the Université Sorbonne Paris Nord, explained that “preservatives are everywhere,” emphasizing the need for a broader understanding of their impact.
“There is no food group/item to remove from the diet in order to fix things,” Hasenböhler said in an email. “These results also support the recommendations for consumers to favour non-to-minimally-processed foods.”
Hasenböhler suggested that individuals should prioritize fresh, uncooked, and unprocessed foods. For those seeking convenience, she recommended “frozen options which are preserved through low temperature, not necessarily through the addition of food additive preservatives.” This advice aligns with the broader goal of reducing reliance on chemical additives while maintaining dietary variety and accessibility.
Broader Implications for Public Health
The study’s methodology involved examining the relationship between preservative intake and health outcomes over years. By analyzing data from the NutriNet-Santé database, researchers identified patterns in preservative consumption and compared them to medical records. This long-term approach provides a clearer picture of how specific additives might influence cardiovascular risk independently of other dietary factors.
While the findings highlight the potential dangers of certain preservatives, they do not dismiss the benefits of antioxidants in natural forms. The key distinction lies in the context of their use: preservatives added to processed foods may differ in their physiological effects compared to the antioxidants found in whole foods. Touvier stressed that “even ‘natural’ preservatives, when used in food production, may not mirror the benefits of their naturally occurring counterparts.”
As awareness of preservatives’ health effects grows, the implications for public health become more pronounced. The study serves as a reminder that the cumulative impact of additives in daily diets can significantly affect long-term cardiovascular health. It also encourages consumers to make informed choices, favoring foods with minimal processing and natural preservation methods whenever possible.
With ultraprocessed foods continuing to dominate modern diets, the need for clearer guidelines and further research remains critical. The NutriNet-Santé team’s work not only identifies specific preservatives as risk factors but also opens the door to exploring other additives that might contribute to similar health outcomes. As the global population grapples with rising rates of hypertension and heart disease, these findings offer a compelling case for reevaluating the role of preservatives in our food systems.
