Rapeseed oil contains erucic acid, a fatty acid that has been linked to negative health effects in animal studies and as it is not fully metabolized in the human body, high consumption may result in the formation of harmful triglycerides. While unrefined rapeseed oil contains many beneficial nutrients such as vitamin E and antioxidants, the refining process of rapeseed oil uses high heat and chemical solvents which may result in the formation of volatile compounds, trans fats, and cause a significant loss in nutrients. While some studies have suggested health benefits of cold rapeseed oil supplementation, consuming oil cold cannot be compared to consuming heated oil that is rich in polyunsaturated fats, as these fats can oxidize when heated and form harmful compounds.