PROBLEM TO BE SOLVED: To provide iron compound-containing composition particles which can inhibit change of color of iron compounds during storage, to provide methods of inhibiting change of color of iron compounds, and to provide compositions containing iron compound and vitamin C.SOLUTION: The present invention provides iron compound-containing composition particles containing an iron compound and an organic acid, a method of inhibiting change of color of an iron compound comprising the granulating step for granulating a composition containing an iron compound and an organic acid, as well as a composition containing an iron compound and vitamin C, which contains the iron compound-containing composition particles and vitamin C.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】保存している間の鉄化合物の変色を抑制できる、鉄化合物含有組成物の粒子、鉄化合物の変色抑制方法、並びに鉄化合物及びビタミンC含有組成物を提供すること。【解決手段】鉄化合物と、有機酸とを含有する鉄化合物含有組成物の粒子、鉄化合物と、有機酸とを含有する組成物を造粒する造粒工程を含む鉄化合物の変色抑制方法、並びに前記鉄化合物含有組成物の粒子と、ビタミンCとを含有する鉄化合物及びビタミンC含有組成物である。【選択図】なし
