PROBLEM TO BE SOLVED: To improve bioabsorbability of a pteridine derivative.SOLUTION: This invention provides a composition with improved bioabsorbability of a pteridine derivative, comprising enzyme-treated rutin and the pteridine derivative; and a bioabsorbency promoter for a pteridine derivative comprising enzyme-treated rutin.【課題】プテリジン誘導体の生体吸収性を向上させる。【解決手段】酵素処理ルチンとプテリジン誘導体とを含有する、プテリジン誘導体の生体吸収性が向上した組成物;および酵素処理ルチンを含有する、プテリジン誘導体の生体吸収促進剤。【選択図】なし