Question

Oil and fat containing food items are flushed with nitrogen. Why?

Answer 1

The main purpose of flushing nitrogen into food packets that contain oil and fat is to prevent rancidity, which occurs when the oil or fat reacts with oxygen, releasing an unpleasant smell and taste. Therefore, flushing nitrogen creates an unreactive environment, thus preventing rancidity.

Answer 2

Oil and fat-containing food items are flushed with nitrogen because nitrogen acts as an antioxidant and prevents them from being oxidised.