The Truth about Residual Hexane in Cooking Oil

By Sakshi Lalwani, Nutrition Advisor, Tata Simply Better

Did you know that the cooking oil you use every day might contain traces of a chemical solvent? Hexane, is one such chemical solvent, commonly employed in the extraction of vegetable oils from seeds and nuts. This process, integral to refining oils, has garnered attention due to its potential health implications. While hexane extraction proven to be efficient and widely adopted, the presence of residual hexane has raised significant concerns regarding both in terms of health and safety. It’s therefore imperative to understand what residual hexane in refined oils means, its impact on our health and well-being and how this informs our choices in identifying the best alternatives:

 

Traces within limits

 

Hexane refers to the remaining traces of this solvent left behind after a solvent extraction process. Studies have shown that the amount of hexane in various refined vegetable oils is generally well below established safety thresholds. In India, regulatory standards set by FSSAI specify a maximum allowable limit of 5.0 ppm for hexane in refined oils (FSSAI, 2023). Oils obtained through cold-pressed methods are naturally free from hexane residues, ensuring a pure and wholesome choice. While the health risks associated with these MRLs are minimal, staying informed about all possible exposures supports a proactive and holistic approach to well-being.

 

 

 

Nutritional value chaos

 

Much has been said about the residual hexane changing the nutritional profile of the oil it has worked on. On the contrary, hexane extraction is known to extract only the fats from the oilseed without disturbing other nutrients, fibre, or protein content. However, the refining process that follows could lead to formation of trans fats as it involves bleaching and deodrising. It may also diminish certain vitamins and beneficial compounds, such as Vitamin E and omega-3 fatty acids that are naturally present in unrefined oils. This does not happen in alternative methods, particularly cold-pressed oils, making them nutritionally richer.

 

Watch for toxic reactions

 

Although rare, any exposure to hexane traces, no matter how low, can trigger physical reactions. Some individuals may experience sensitivities to refined oils, potentially including digestive discomfort or skin reactions. These reactions are uncommon and usually mild. Some other symptoms might include headaches, nausea, vomitting, dizziness, or lightheadedness. It is, however, essential to be aware of personal sensitivities and consult with healthcare professionals if you experience any adverse effects.

 

Opt for a cold-pressed alternative

 

In light of the concerns surrounding hexane extraction, cold-pressed oils stand out as a better choice. Free from chemicals like hexane, they retain their natural nutrients and offer a healthier, safer alternative for your kitchen. These oils undergo a natural extraction process without the use of any chemicals, ensuring zero residue. Choosing cold-pressed oils supports more eco-friendly production methods, minimizing environmental harm and aligning with a sustainable lifestyle.