Abstract: The invention relates to a device (1) arranged to bring about a decreased degradation of food placed in an gas tight food package (5, 45, 49), the device comprising a gas conductor (7, 39) adapted to be connected between a gas supply (9a, 9b) and the food package (5, 45, 49) for changing the composition of the gas inside the food package (5, 45, 49) to a composition with food preserving qualities. The invention also relates to a use of such a device (1).