A new study led by US researchers suggests that the increasing use of certain cooking oils in ultra-processed Western diets may be contributing to a rise in colon cancer cases, particularly among younger individuals, Independent reports.
The study identifies seed oils such as sunflower, grapeseed, canola, and corn as potential triggers for chronic inflammation in the body, a known risk factor for cancer.
The research, which was published in the Gut journal, analyzed tumors from over 80 people aged 30 to 85 diagnosed with colon cancer. The study found that the tumors contained higher levels of bioactive lipids—small molecules produced when the body metabolizes seed oils. These bioactive lipids were more prevalent in tumors from individuals who consumed a diet rich in seed oils compared to those who consumed healthier fats, such as omega-3 fatty acids.
According to the study, bioactive lipids not only increase inflammation but also interfere with the body’s ability to heal naturally, thus promoting tumor growth. The researchers suggest that omega-3-rich oils, such as those found in avocados and olive oil, could be a healthier alternative to seed oils.
Health experts have long been concerned about the inflammatory effects of certain oils commonly used in processed foods. Dr. Timothy Yeatman, a renowned physician-scientist and associate center director for Translational Research and Innovation at the TGH Cancer Institute, emphasized the importance of reevaluating the Western diet, particularly the excessive consumption of added sugars, saturated fats, ultra-processed foods, and seed oils.
Dr. Yeatman explained that chronic inflammation, which is often associated with poor dietary choices, is a key factor in many cancers. He described cancer as a “chronic wound” that does not heal, stating that diets high in ultra-processed foods and seed oils hinder the body’s natural healing processes and immune response, which in turn facilitates cancer growth.
While the findings of this study are significant, leading US health institutions have stated that moderate consumption of seed oils as part of a balanced diet has not been conclusively linked to cancer. These health organizations stress that overall diet quality, lifestyle factors, and genetics play a much larger role in cancer risk.
In addition, researchers caution that more studies are needed to fully understand the potential connection between seed oils and colon cancer. While this study highlights a possible link, the evidence is not yet strong enough to definitively establish causality.
