PROBLEM TO BE SOLVED: To provide a technique to diagnose NASH noninvasively.SOLUTION: The present invention provides an oral composition for the prevention, improvement or treatment of non-alcoholic steatohepatitis (NASH), the composition having flavonoid as an active ingredient.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】NASHを非侵襲的に診断する技術を提供する。【解決手段】フラボノイドを有効成分として含む、非アルコール性脂肪性肝炎(NASH)の予防、改善又は治療用の経口組成物。【選択図】図1