Refined oil is preferred because less saturated fat. Saturated fats increase the cholesterol level in the blood. Their high consumption is linked with the heart diseases. That is why, doctors recommend refined oil.
Thanks Dr. J.M.Koli, Segun and Eman Kareem for you concern. But I have different opinion. In fact Refined oils are chemically treated makes it quite harmful.
Though generally mustard oil is regarded as healthy, researchers have found its downside too. Mustard oil has considerable amounts of erucic acid and heavy consumption may cause diarrhea or anemia. It is also known to cause skin eruptions and Rhinitis. It is recommended to consume moderate amounts of mustard oil so that you don't expose yourself to such risks.
Refined oils have much more harmful effects on your health than mustard oil. To begin with, the very fact that it is chemically treated makes it quite harmful. The process of refining involves nickel which has detrimental effects on the skin, respiratory system and liver. Preservatives and sodium hydroxide are also added during the processing which is harmful to the digestive system.
It is always better to go natural; so, mustard oil wins the debate but not without some glitches. It is advisable to choose your oil wisely and also monitor your consumption.
Yes, saturated oil increases the level of cholesterol in the blood. Refined oil is far much better as decreases the level of cholesterol in the human body that is why it is more preferable for human diet.
In the sense that it is refined with a high degree of purity) ..... The body encapsulates parts of oil partially destroyed, and stored somewhere in the body can not cause significant damage, as areas store fat in the body.