It is a known fact that certain cooking oils are better for health as compared to others. However, according to a recent study reusing cooking oil could adversely affect your health. It was found that people who consumed any type of oil that had been reused a number of times had high blood pressure as compared to those people who mostly used fresh cooking oil.
Researchers have found that people who consume sunflower oil were also at an increased risk of developing high blood pressure. On the other hand, olive oil seemed to prevent high blood pressure. Depending on these findings the researchers recommend that whenever possible food should be cooked in olive oil and the oil should be used only 2 or 3 times, thereafter it should be discarded.
According to the researchers reusing oil can decrease its beneficial effects. When it is repeatedly reheated, oil begins to degrade. This results in release of certain harmful substances called polymers and polar compounds that may be absorbed by the food cooked in the oil and thereby adversely affect the health.
To observe the effect of reuse of cooking oil, a study was conducted. The researchers collected reused oil from the kitchen of 538 people and then measured the level of polymers and polar compounds in the oil. It was observed that oil, which was reused a number of times showed high levels of polymers and polar compounds and therefore was likely to make a person more prone to developing high blood pressure.
During this study it was also found that people having high levels of fats (predominantly found in olive oil) in their blood were at a lesser risk of having high blood pressure. The researchers also concluded that olive oil that had been used repeatedly showed lesser concentration of polymers and polar compounds as compared to other oils. This shows that on being heated olive oil degrades slowly as compared to other type of oils. Hence, researchers recommend use of more health friendly olive oil as compared to other oils. However, a higher price of olive oil can prevent people to consume olive oil. Hence it may be substituted by oils such as soyabean oil, groundnut oil, mustard oil, sesame oil but care should be taken not to use the oil once it has been used 2 or 3 times.