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March 2, 2025 – Seed oils, derived from plants like canola, corn, and soybean, have recently come under fire from some media influencers, raising concerns about their health implications. However, a dietitian clarifies the facts surrounding these oils, addressing concerns about processing and fat content.
Seed oils, including canola, corn, cottonseed, soybean, sunflower, safflower, grapeseed, and rice bran, are extracted through a more complex process than oils derived from fruits like olives or avocados. A common solvent used in this extraction is hexane, a compound that has raised concerns due to its potential toxicity when inhaled as a gas.
According to a 2022 article in the journal Foods, hexane is used in the production of natural extracts, drugs, and nutraceuticals. While hexane can be toxic if inhaled, it is evaporated after extracting the oil from seeds, leaving only trace amounts. The Department of Health and Human Services Agency for Toxic Substances and Disease Registry has determined these trace amounts to be “toxicologically insignificant.”
Another point of contention is the high content of monounsaturated and polyunsaturated fatty acids (MUFAs and PUFAs) in seed oils, particularly the omega-6 PUFA, linoleic acid. Critics argue that excessive omega-6 intake is detrimental to health.
However, omega-6 fatty acids are essential nutrients that the human body cannot produce. They, along with omega-3 alpha-linolenic acid (ALA), must be obtained through diet. Clinical trials have demonstrated that replacing saturated fats with MUFAs and PUFAs can benefit heart health and potentially lower the risk of type 2 diabetes.
In summary, while the processing of seed oils involves the use of solvents like hexane, the residual amounts are deemed safe. Furthermore, the presence of omega-6 fatty acids, although a point of contention, is essential for human health.
Disclaimer: This news article is based on information available at the time of publication and reflects current scientific understanding. Nutritional recommendations can evolve, and individual dietary needs vary. This article is for informational purposes only and does not constitute medical or dietary advice. Consult with a qualified healthcare professional or registered dietitian for personalized guidance before making significant dietary changes. The information regarding hexane is based on current scientific understanding and regulatory assessments.
