PROBLEM TO BE SOLVED: To provide an anti-fatigue agent which effectively causes an anti-fatigue effect in spite of lower addition amount than the amount of active ingredients of a branched chain amino acid in a case of using a branched chain amino acid as an anti-fatigue material in a drink such as a sports drink.SOLUTION: The anti-fatigue agent composition contains 170-5000 mg/kg of a branched chain amino acid and an imidazole peptide, and the content ratio of the imidazole dipeptide to branched chain amino acid is 0.005-0.6 times the amount on a mass basis of a branched chain amino acid.COPYRIGHT: (C)2014,JPO&INPIT【課題】分岐鎖アミノ酸を抗疲労素材としてスポーツドリンクなどの飲料に使用した場合に、分岐鎖アミノ酸の有効成分量を下回る添加量であっても、効果的に抗疲労効果を生じさせる抗疲労剤の提供。【解決手段】分岐鎖アミノ酸を170~5000mg/Kg及びイミダゾールペプチドを含有し、分岐鎖アミノ酸に対するイミダゾールジペプチドの含有比率が、質量基準で分岐鎖アミノ酸の0.005~0.6倍量含有することを特徴とする抗疲労剤組成物。【選択図】図4
