A composition for ameliorating hypoalbuminemia, which contains a branched amino acid as an active ingredient, and which is characterized in that leucine and/or isoleucine is contained as the active ingredient and valine is not contained. It is preferred that both leucine and isoleucine be contained as the branched amino acid. The ratio of the mass of leucine to the mass of isoleucine is preferably 0.1 to 10 inclusive. As the branched amino acid, only leucine or isoleucine may be contained. The composition can be used suitably in the form of an infusion preparation, an oral preparation, a food or a beverage.本發明係含有支鏈胺基酸為有效成分之低白蛋白血症改善用組成物,本發明之特徵係含有作為有效成分之白胺酸及/或異白胺酸,未含有纈胺酸。前述支鏈胺基酸只要含有白胺酸及異白胺酸即可。白胺酸相對於前述異白胺酸的質量比以0.1以上10以下為佳。前述支鏈胺基酸亦可僅含有白胺酸或異白胺酸。可適於使用為輸液製劑、經口製劑或飲食品等型態。
