Being the oral formulation which becomes combining branched chain amino acid and glycine, the below-mentioned feature (1) or feature the oral formulation which (2) is filled up.Feature (1): Branched chain amino acid or the amino acid other than glycine are not contained, the oral formulation.Feature (2): Blendinging proportion (mass ratio) of the valine, the leucine and isoleucine, the valine/the leucine/isoleucine =1.0 - 1.3/1.9 - 2.2/1.0 is, the oral formulation.分岐鎖アミノ酸及びグリシンを組み合わせてなる経口製剤であって、下記態様(1)又は態様(2)を満たす経口製剤。態様(1):分岐鎖アミノ酸及びグリシン以外のアミノ酸を含有しない、経口製剤。態様(2):バリン、ロイシン、イソロイシンの配合割合(質量比)が、バリン/ロイシン/イソロイシン=1.0~1.3/1.9~2.2/1.0である、経口製剤。
