Reusing Cooking Oil: A Recipe for Brain Damage?

A recent animal study indicates that reusing the same frying oil can cause significant damage to health. "To the best of our knowledge, we are the first to report long-term damage. Supplements of repeatedly fried oils increase nerve degeneration," says Professor Kathiresan Selvam, a lecturer at Tamil Nadu University in India and the lead researcher.

In the study, animals were divided into five groups. Some received standard food supplemented with 0.1 ml of unheated sesame or sunflower oil, while the others received sesame or sunflower oil that had been continuously reheated for 30 days. The reheated oils were used to simulate the effects of repeated frying with the same oil.

Animals consuming the reheated oil showed increased liver inflammation, colon damage, and elevated bacterial levels in their bodies. Researchers also observed high levels of nerve degeneration among these animals.

"The metabolism of fats in the liver changed significantly. The transport of essential omega-3 fatty acids to the brain was reduced, leading to noticeable nerve degeneration," the study reports.

The findings are clear: reheating oil poses serious health risks and should be avoided. Beyond this, a diet high in oils is generally less healthy. Choosing a natural, nutritious diet is far more beneficial. If you do eat fried foods, pay close attention to oil use; allowing oil to cool and then reusing it for frying can make it dangerous.