PROBLEM TO BE SOLVED: To provide a highly safe composition which has an effect of building muscle without increasing fat and can be used to build muscle of humans or animals such as aged people having a problem of muscle weakening or sick people resting in beds, children or young people requiring the development of muscle and body, healthy people or athletes wishing to suppress muscle weakening and to build muscle, and as well as livestock required to have accelerated growth and improvement in meat quality.SOLUTION: The composition for building muscles contains wheat embryos of wheat such as Pan wheat of Poaceae Triticum, durum wheat, compactum wheat, spelta wheat, dicoccum wheat, Aegilops tauschii, Aegilops speltoides and the like.COPYRIGHT: (C)2012,JPO&INPIT【課題】脂肪を増加させることなく筋肉を増強させる作用を有し、筋力低下に悩む高齢者及びベッドレスト者等の病者、筋肉や身体の発達が必要な小児や若年者、筋力低下の抑止や筋力増強を所望する健常者及びアスリート、ならびに成育促進又は肉質の向上が所望される家畜等の動物等のヒト又は動物における筋肉増強のために使用することができる安全性の高い組成物の提供。【解決手段】イネ科コムギ属のパンコムギ、デュラムコムギ、クラブコムギ、スペルトコムギ、エンマコムギ等や、イネ科エギロプス属のタルホコムギ、クサビコムギ等の小麦胚芽を含有する筋肉増強用組成物。【選択図】なし