Problem to be solved. To provide a brain hypofunction inhibitor that improves or ameliorates both core and peripheral symptoms associated with higher brain dysfunction caused by brain hypofunction resulting from aging or brain disease, and suppresses the exacerbation of higher brain dysfunction. Solution. Provided is a brain hypofunction inhibitor containing an aroma component derived from black tea as an active ingredient. The aroma component derived from black tea is a distillate of black tea. The brain function is higher brain function, motor regulation function and/or body balance function, and the higher brain function is execution function, and left-right recognition. And, it is used for the improvement and amelioration of core or peripheral symptoms of higher brain dysfunction associated with decreased brain function.

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