Modified atmosphere packaging (MAP) is a technique used to extend the shelf life of food products by altering the composition of gases within the package. It involves replacing the atmospheric air inside the package with a modified gas mixture that helps preserve the quality and freshness of the food.
To decelerate oxidation processes and thus, spoilage, the oxygen content within the package is reduced. Oxygen levels are typically lowered to around 1-5% and replaced with other gases such as nitrogen or carbon dioxide.