PROBLEM TO BE SOLVED: To provide a composition for inhibiting loss of muscle mass which can inhibit loss of muscle mass as well as enhancing vitality without imposing an excess load on a patient in alimentotherapy, and is effective in inhibiting loss of muscle mass occurred in cachexia caused by aging, cancer and the like.SOLUTION: A composition for inhibiting loss of muscular mass to people exhibiting sarcopenia symptoms contains soft-shelled turtle powder in which a soft-shelled turtle egg and soft-shelled turtle oil extracted from fat portion of a soft-shelled turtle are contained, and further contains oyster powder.COPYRIGHT: (C)2016,JPO&INPIT【課題】食事療法の際に患者に過度な負担をかけることなく、筋量低下を抑制することができ、同時に活力も増強させることができる、加齢やがんなどによる悪液質でみられる筋量の低下の抑制に有効な筋量低下抑制組成物の提供。【解決手段】すっぽんの粉末に、すっぽん卵とすっぽんの脂肪部から抽出したすっぽんオイルとを含有させたことを特徴とし、さらにカキ粉末を含有させること特徴とした、サルコペニアの状態にある人に与えるための筋量低下抑制組成物。【選択図】図6