<p>An orally administrable formulation which is obtained by combining a branched chain amino acid and glycine, and satisfies the following condition (1) or condition (2). condition (1): The orally administrable formulation does not contain any amino acid other than branched chain amino acids and glycine. condition (2): The orally administrable formulation has a blending ratio (mass ratio) among valine, leucine and isoleucine, namely a blending ratio of valine/leucine/isoleucine of 1.0-1.3/1.9-2.2/1.0.</p>
