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 recent study conducted in France has revealed a significant connection between certain food preservatives and increased health risks, particularly elevated blood pressure and cardiovascular issues such as heart attacks and strokes. The research, published in the European Heart Journal, analyzed the impact of 58 preservatives on the health of over 112,000 individuals aged 15 and above, highlighting how even substances marketed as “natural” can contribute to these concerns. The findings suggest that the use of specific preservatives may elevate the likelihood of hypertension by 29% and cardiovascular events by 16%, underscoring a growing need to reassess the role of additives in modern diets.
Study Details and Key Findings
The study, part of the NutriNet-Santé project, tracked participants’ dietary habits over an extended period, linking preservative consumption to medical data from France’s national healthcare system. Each participant recorded their food and drink intake by brand name for three days every six months, allowing researchers to map ingredient usage and correlate it with health outcomes. This comprehensive approach enabled the identification of common preservatives and their long-term effects on cardiovascular health. Among the 58 additives examined, eight were found to be associated with a notable rise in blood pressure over a decade, even after accounting for other dietary factors.
Expert Insights and Context
“Naturally occurring ascorbic acid and added ascorbic acid — which may be chemically manufactured — may have different impacts on health,” said Mathilde Touvier, senior author of the study and director of research at France’s National Institute of Health and Medical Research. “Thus, the results observed here for these food additives are not true for natural substances found in fruits and vegetables.”
Touvier emphasized that while antioxidants like citric acid and ascorbic acid are naturally present in foods such as fruits, their use as preservatives in processed items can still pose risks. The research found that individuals consuming more foods with these additives faced a 22% higher chance of developing high blood pressure, even though they are often labeled as “natural.” This distinction is crucial, as the study suggests that the context of usage—whether in natural or processed forms—may influence their health effects.
“This is one of the first large studies to look at individual preservatives rather than treating ultra-processed foods as a single category,” noted Tracy Parker, nutrition lead at the British Heart Foundation. “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.”
Parker also highlighted how ultraprocessed foods, which are already associated with a 50% increased risk of cardiovascular disease-related mortality, may contribute to other health problems such as obesity (55% higher risk), sleep disorders (41% higher risk), and type 2 diabetes (40% higher risk). These conditions are known to worsen heart health, reinforcing the urgency of understanding preservative-specific impacts. The study aligns with the recent European Society of Cardiology consensus, which identifies ultraprocessed foods as a critical public health issue.
Preservatives in Focus
Among the preservatives studied, three non-antioxidant types stood out for their association with higher blood pressure: potassium sorbate, potassium metabisulphite, and sodium nitrite. Potassium sorbate is commonly used in wines, baked goods, cheeses, and sauces to prevent spoilage. Potassium metabisulphite, which releases sulfur dioxide when dissolved, is prevalent in wines, fruit juices, ciders, and other fermented beverages. Sodium nitrite, a chemical salt, is frequently added to processed meats like bacon, ham, and deli meats to preserve color and flavor.
These non-antioxidant preservatives work by inhibiting bacteria, molds, and yeast, which can extend shelf life but may also impact health. Notably, the study found that even though nitrates and sulfur-based compounds are naturally present in red and processed meats, their added forms in foods can amplify the risk of cardiovascular diseases. The findings suggest that the cumulative effect of these additives, when consumed in large quantities, may have consequences beyond their individual properties.
Methodology and Broader Implications
The NutriNet-Santé study, which has been monitoring French volunteers’ diets since 2009, provided the data for this analysis. By integrating detailed ingredient tracking with medical records, researchers were able to assess long-term trends in preservative consumption and their effects on blood pressure and heart health. This method allows for a nuanced understanding of how specific additives, rather than the foods they are in, might influence risk factors.
While the study found that ultraprocessed foods account for only 35% of all preservative-containing items consumed, the widespread use of these additives means they are present in nearly every food category. Lead author Anaïs Hasenböhler, a doctoral student at the Université Sorbonne Paris Nord, noted that preservatives are “ubiquitous” and that removing one food group entirely may not be the solution. Instead, she advocated for a shift toward minimally processed foods, emphasizing the importance of choosing fresh, uncooked items or frozen options preserved through low temperatures rather than chemical additives.
Conclusion and Recommendations
The research adds a new layer to the ongoing debate about the health impacts of processed foods. By isolating individual preservatives, the study provides evidence that specific additives—such as potassium sorbate, potassium metabisulphite, and sodium nitrite—may play a more direct role in cardiovascular risk than previously thought. These results support dietary guidelines encouraging consumers to prioritize whole, unprocessed foods and limit reliance on preservatives. As the study’s authors note, further research is needed to explore the mechanisms behind these effects, but the findings underscore the importance of mindful food choices in reducing health risks.
For individuals seeking to improve their cardiovascular health, the study suggests a focus on reducing exposure to these additives, especially in ultraprocessed items. While not all preservatives are equally harmful, the cumulative effect of their frequent use could contribute to the rising prevalence of hypertension and heart disease. The study also highlights the need for clearer labeling and consumer education, ensuring that the “natural” label does not overshadow potential health concerns. As the global shift toward processed diets continues, these findings offer valuable insights for both public health initiatives and personal dietary decisions.
