PROBLEM TO BE SOLVED: To provide a package of food raw material which can acquire a decoloration suppression sustaining effect by using a chemical substance derived from the food raw material without adding additives to the food raw material, and a method of decoloration suppression for the same.SOLUTION: In a package in which pneumatic packaging of food raw material is performed, nitrogen dioxide in the package is sucked, the nitrogen dioxide is converted into nitrogen monoxide, and a circulation agent of nitrogen oxide discharging nitrogen monoxide into the package is encapsulated. A pH of the circulation agent is less than 5.0 and the circulation agent is one or more selected from ascorbic acid sodium, glutathione, cystine, and hydrosulfite sodium.SELECTED DRAWING: None
