PROBLEM TO BE SOLVED: To suppress discoloration of a composition containing a peptide-containing composition, which can easily suppress a change in color tone of the composition containing the peptide-containing material, and a powder composition containing a peptide-containing material in which the change in color tone is suppressed. , Granules, and tablets. SOLUTION: A method for suppressing discoloration of a composition containing a peptide-containing material, which comprises contacting a peptide-containing material with a silicate as a discoloration inhibitor, a peptide-containing material, and a silicate as a discoloration inhibitor. A powder composition or granule containing the above, and a tablet containing at least one of the powder composition and the granule. [Selection diagram] None【課題】ペプチド含有物を含む組成物の色調の変化を簡易に抑制することができるペプチド含有物を含む組成物の変色抑制方法、並びに色調の変化が抑制されたペプチド含有物を含む粉末組成物、顆粒、及び錠剤の提供。【解決手段】ペプチド含有物と、変色抑制剤としてのケイ酸塩とを接触させることを含むペプチド含有物を含む組成物の変色抑制方法、ペプチド含有物と、変色抑制剤としてのケイ酸塩とを含有する粉末組成物又は顆粒、並びに前記粉末組成物及び顆粒の少なくともいずれかを含有する錠剤である。【選択図】なし
