< Topic >Decrease of the bitterness which is superior and dissolved speed it was improved, the valine, isoleucine and the leucine blend are offered. SolutionsThe above-mentioned topic is solved the valine, isoleucine and the solid solution which consists of the amino acid of 3 genera of leucine and aliphatic neutral amino acid, oxy neutral amino acid, Acid amide neutral amino acid, acidic amino acid and basic amino acid, by the solid solution which at least adds 1 where it is chosen from the group which consists of the hydroxy Acid genera in this.【課題】優れた苦味の低減と、溶解速度の改善された、バリン、イソロイシン、ロイシン混合物を提供する。【解決手段】上記課題は、バリン、イソロイシン、ロイシンの3種のアミノ酸からなる固溶体およびこれに脂肪族中性アミノ酸、オキシ中性アミノ酸、酸アミド中性アミノ酸、酸性アミノ酸、塩基性アミノ酸、ヒドロキシ酸よりなる群から選ばれた少なくとも1種を加えた固溶体によって解決される。
