Processed Foods and Preservatives Linked to Higher Cancer Risk, New Research Warns
Processed Foods and Preservatives Linked to Higher Cancer Risk, New Research Warns
Growing dependence on packaged and long-lasting foods may come with hidden health consequences. New research suggests that consuming large amounts of industrially processed foods and drinks containing common preservatives could raise the risk of developing certain cancers.
The findings, published in The BMJ, indicate that people with higher exposure to several widely used food preservatives faced a greater likelihood of cancer compared to those who consumed little or none of these additives. The preservatives linked to increased risk were mainly non-antioxidant types, such as potassium sorbate, potassium metabisulfite, sodium nitrite, potassium nitrate, and acetic acid, all of which are commonly added to extend shelf life and prevent spoilage.
The study found that total sorbates — particularly potassium sorbate — were associated with a 14 percent higher risk of overall cancer and a 26 percent higher risk of breast cancer. Similarly, total sulfites were linked to a 12 percent increase in overall cancer risk.
Certain preservatives showed stronger associations with specific cancers. Sodium nitrite intake was connected to a 32 percent increased risk of prostate cancer. Potassium nitrate was associated with a 13 percent higher risk of overall cancer and a 22 percent higher risk of breast cancer. Total acetates were linked to a 15 percent rise in overall cancer risk and a 25 percent increase in breast cancer risk, while acetic acid alone was associated with a 12 percent higher risk of overall cancer.
Among antioxidant preservatives, most did not show concerning links. However, total erythorbates and sodium erythorbate stood out, as they were associated with a higher incidence of cancer.
Researchers from Université Paris Cité in France said the findings add important evidence that could influence how food additives are assessed in the future. According to the research team, health authorities may need to re-examine the safety of these preservatives while weighing their benefits for food preservation against potential long-term cancer risks.
They also noted that, at present, public health advice is clearer when it comes to reducing consumption of processed meats and alcohol — both of which are already well-established cancer risk factors. These recommendations offer practical steps for individuals, even as scientific understanding of preservatives continues to evolve.
Although the study does not prove a direct cause-and-effect relationship, the researchers pointed out that several of these compounds are known to affect immune function and inflammatory pathways, mechanisms that may contribute to cancer development.
The research followed 105,260 participants aged 15 years and older who were cancer-free at the start of the study. A total of 17 individual preservatives were examined, including citric acid, lecithins, total sulfites, ascorbic acid, sodium nitrite, potassium sorbate, sodium erythorbate, sodium ascorbate, potassium metabisulfite, and potassium nitrate.
Over the follow-up period, 4,226 participants were diagnosed with cancer. These cases included 1,208 breast cancers, 508 prostate cancers, 352 colorectal cancers, and 2,158 cases of other cancer types.
While more research is needed to fully understand how these preservatives influence cancer risk, the findings highlight the importance of being mindful about food choices. Reducing reliance on heavily processed foods and opting for fresher alternatives may be a sensible step toward long-term health as scientists continue to investigate the impact of food additives on the body.
