A new study has raised concerns over the impact of certain cooking oils on colon cancer risk.
Oils commonly used in everyday cooking, such as sunflower, canola, corn, and grapeseed, have been identified as potentially contributing to the development of colon cancer – particularly in individuals aged 30 to 85.
Published in the medical journal Gut, the study examined 80 patients with colon cancer in the United States and found that the consumption of specific oils increased the risk of developing the disease.
The research highlights the importance of choosing healthier alternatives such as olive and avocado oils to reduce these risks.
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Seed oils
The oils in question which include sunflower, canola, corn and grapeseed oil – are known as “seed oils” and are widely used in cooking.
These oils are high in omega-6 fatty acids, which can promote inflammation in the body.
The study suggests that when consumed in excess, these omega-6 rich oils may cause an imbalance in the body, leading to an environment that fosters the growth and spread of cancer cells, particularly in the colon.
Professor Tim Yeatman, a leading researcher in the study, explains that excessive omega-6 consumption leads to the production of pro-inflammatory lipid mediators, which suppress the immune system and may allow cancer cells to proliferate.
As a result, experts recommend swapping these oils for options rich in omega-3 fatty acids, such as olive and avocado oil.
Benefits of Omega-3 oils
Olive oil – a key component of the Mediterranean diet – has long been associated with numerous health benefits. Not only is it known for promoting heart health, but it also has anti-inflammatory properties that may help prevent chronic diseases.
Similarly, avocado oil, known for its beneficial effects on heart and eye health, is another healthy alternative to omega-6-heavy oils.
In contrast, seed oils were initially invented in the early 1900s and quickly became popular due to their low cost and long shelf life.
While they are still commonly used today, their rise has coincided with the growing prevalence of conditions such as obesity and type 2 diabetes.
The latest study calls for a dietary shift away from omega-6 rich seed oils towards healthier, more nutritious oils like olive oil and avocado oil.
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These oils not only offer anti-inflammatory benefits but also contribute to a more balanced diet that supports overall health.
Forever chemicals
In addition to concerns about cooking oils, a separate environmental issue has raised alarms about the presence of ‘forever chemicals’ in food.
Known as PFAs (per- and polyfluoroalkyl substances), these chemicals are linked to a range of serious health conditions, including cancer, kidney disease and high blood pressure – particularly in pregnant women.
These chemicals which do not break down easily in the environment have been found in common UK fruits, vegetables and spices.
