PROBLEM TO BE SOLVED: To provide a bone density improver, an anti-osteoporosis drug, and an anti-osteoporosis food which are useful in preventing the bone density from lowering in the diseases of bone metabolism such as osteoporosis.SOLUTION: The bone density improver has pyruvic acid or its pharmaceutically acceptable salt as an active ingredient. The anti-osteoporosis drug has pyruvic acid or its pharmaceutically acceptable salt as an active ingredient.COPYRIGHT: (C)2006,JPO&NCIPI【課題】 骨粗鬆症などの骨代謝性疾患における骨密度の低下の予防・治療に有用な骨密度向上剤、抗骨粗鬆症薬および抗骨粗鬆症食品を提供すること。【解決手段】 ピルビン酸またはその薬学上許容される塩を有効成分とすることを特徴とするものである。【選択図】 図1
