Oil and fat containing food items are flushed with Nitrogen. Why?
The spoilage of food in such a way that it becomes unfit to eat is called rancidity.
It is caused by oxidation of fats and oils present in food.
It causes change in smell and taste of food
Nitrogen acts as an antioxidant , thus preventing oxidation of food and getting it spoiled.
This is the reason why oil and fat containing food items are flushed with nitrogen.