PROBLEM TO BE SOLVED: To provide novel factors having an action to proliferate hematopoietic stem cells, suitable for daily continuous use and highly safe, and to provide compositions such as medicine and food for treating, improving and preventing diseases or conditions associated with reduction in number or function of hematopoietic stem cells.SOLUTION: Provided is an agent for promoting proliferation of hematopoietic stem cells comprising an extract of Astragalus complanatus R.Br. (flat stem milk vetch), as well as pharmaceuticals or food and drink products comprising the agent.COPYRIGHT: (C)2016,JPO&INPIT【課題】日常的に継続使用でき、かつ安全性の高い造血幹細胞を増殖する作用を有する新たな因子を見出し、造血幹細胞の減少または機能低下に関連する疾患または病態を治療、改善、および予防するための医薬品や飲食品などの組成物を提供すること。【解決手段】ツルレンゲの抽出物を有効成分として含有する造血幹細胞の増殖促進剤、該造血幹細胞の増殖促進剤を含有する医薬品または飲食品。【選択図】なし
