Found this on the net about reusing cooking oil.
Thursday, January 28, 2010
Many kitchens often see reusing of the cooking oil. It was believed that there was no danger in reusing cooked oil especially vegetable oils. But recent researches have found out that reusing cooked, or boiled vegetable oils again to cook will create big hazard to life.
A recent study found that a toxin called 4-hydroxy-trans-2-nonenal (HNE) forms when such oils as canola, corn, soybean and sunflower oils are reheated. Consumption of foods containing HNE from cooking oils has been associated with increased risks of cardiovascular disease, stroke, Parkinson'?s disease, Alzheimer's disease, Huntington's disease, various liver disorders, and cancer.
Once absorbed in the body, HNE reacts with DNA, RNA and proteins affecting basic cellular processes. HNE is a well known, highly toxic compound that is easily absorbed from the diet,is highly reactive with proteins, nucleic acids--DNA and RNA. HNE is formed from the oxidation of linoleic acid, and reports have related it to several diseases, including atherosclerosis, stroke, Parkinson's, Alzheimer's, Huntington's and liver diseases.