Cold plasma is a non-thermal process that can be used for food processing and sterilization. It involves ionizing a gas such as air or mixtures containing noble gases and oxygen, through the application of a high voltage electrical discharge or other energy sources. This creates a plasma of reactive species like ions, electrons, and radicals that can kill microbes. Common gases used include air, nitrogen, and mixtures with oxygen or noble gases like helium and argon. The reactive oxygen species in particular help inactivate microbes and impact food quality. Some key applications of cold plasma include sterilization of food products.