PROBLEM TO BE SOLVED: To obtain a bone metabolism-improving agent and food and drink for preventing or curing osteoporosis, having excellent osteoblast proliferation- promoting action or osteoblast calcification-promoting action, capable of being routinely taken as food and drink, different from formulations in clinical use and highly safe with remarkably little adverse effects.SOLUTION: The bone metabolism-improving agent contains an osteoblast calcification-promoting ingredient extracted from plants belonging to Boraginaceae Ehretia as an effective ingredient or the bone metabolism- improving agent contains (A) an extract of plants belonging to Boraginaceae Ehretia and (B) an extract of one or more kinds of plants selected from embryo buds of Nelumbo uncifera, leaves of star fruits, leaves and stems of Alpinia speciosa, leaves and stems of Glycyrrhiza, pericarps of Tamarindus indica, leaves of Engelhardtia chrysolepis H. And Curcuma longa as effective ingredients, and the food and drink for preventing or curing osteoporosis contains the bone metabolism-improving agent.COPYRIGHT: (C)2003,JPO【解決手段】 ムラサキ科チシャノキ属植物から抽出される骨芽細胞石灰化促進成分を有効成分として含む骨代謝改善剤、又は(A)ムラサキ科チシャノキ属植物の抽出物と、(B)ハス胚芽、五斂子葉、月桃葉及び茎、甘草葉及び茎、タマリンド果皮、黄杞葉並びにウコンから選ばれる1種又は2種以上の植物の抽出物と、を有効成分として含む骨代謝改善剤、及びこれら骨代謝改善剤を含む骨粗鬆症の予防又は治療用飲食物。【効果】 本発明の骨代謝改善剤及び骨粗鬆症の予防又は治療用飲食物は、優れた骨芽細胞増殖促進作用又は骨芽細胞石灰化促進作用を有すると共に、日常的に飲食物として簡単に摂取でき、臨床で用いられている製剤とは異なり、副作用が極めて少なく安全性が高いものである。