Reuse of frying oil linked to health risks and toxic chemicals
Frying is one of the most popular methods of preparing food, yet it also presents significant health challenges. A key question to consider is: can you use the same oil multiple times? Many people, looking to save money, opt to reuse oil, but few are aware of the consequences of this choice.
At first glance, reusing oil might appear harmless—it's just fat that's been heated. Unfortunately, during frying, oil undergoes complex chemical changes that alter its composition and properties. Harmful substances are produced, which can negatively affect our health, especially when the oil has been previously heated to high temperatures.
Why is multiple frying with the same oil dangerous?
During frying, oil undergoes oxidation, producing toxic compounds like acrolein and free radicals. These substances can be carcinogenic and lead to serious chronic diseases, such as atherosclerosis or hypertension. The more times you use the same oil, the more harmful it becomes, and the foods fried in it absorb these unhealthy compounds.
Additionally, oil that is repeatedly heated changes its properties—it can begin to smoke at a lower temperature, making frying less effective and less tasty. Oil saturated with burnt residue can also negatively affect the flavour of food.
How to maintain health while frying?
The most crucial factor is to use the right type of fat. Oils with a high smoke point, such as refined rapeseed oil, coconut oil, or lard, are less prone to harmful chemical changes. However, if you choose to fry, remember to discard the oil after one use. An excellent alternative is to use the oven or grill pan, which eliminates the need for deep frying.
Why is it important to pay attention to the quality of oil?
Selecting the appropriate oil is key to healthy frying. Although cold-pressed oils are healthier in their raw form, they are not suitable for high temperatures. Conversely, refined oils, although processed, perform better during frying. If you want to look after your health, adhere to the guidelines that minimise the risks associated with using oil in the kitchen.
