METHOD FOR SUPPRESSING DISCOLORATION OF COMPOSITION CONTAINING AMINO ACID OR SALT THEREOF AND VITAMIN C, AND POWDER COMPOSITIONS, GRANULES AND TABLETS

To provide methods for suppressing discoloration of a composition containing an amino acid or a salt thereof and vitamin C, which can easily suppress a change in color tone of a composition containing an amino acid or a salt thereof and vitamin C, and to provide powder compositions, granules, and tablets containing an amino acid or a salt thereof and vitamin C with suppressed change in color tone.SOLUTION: The invention relates to a method for suppressing discoloration of a composition containing an amino acid or a salt thereof and a vitamin C, the discoloration being a color change caused by the coexistence of the amino acid or a salt thereof and the vitamin C, the method comprising contacting silicate as a discoloration inhibitor that suppresses the discoloration, with an amino acid or a salt thereof and vitamin C; to powder compositions or granules containing an amino acid or a salt...