PROBLEM TO BE SOLVED: To provide a powder composition suppressing browning occurring during preservation of a &gamma-aminobutyric acid.SOLUTION: The powder composition comprises a &gamma-aminobutyric acid and a hyaluronic acid and/or its salt and has an average particle diameter of 5-500 &mum.COPYRIGHT: (C)2010,JPO&INPIT【課題】γ-アミノ酪酸の保存中に起こる褐変を抑制した粉末状組成物を提供する。【解決手段】γ-アミノ酪酸と、ヒアルロン酸および/またはその塩を含有する、平均粒子径5~500μmである粉末状組成物。【選択図】なし