| 摘要 |
There have been required drugs, health foods and so on whereby subjective symptoms, for example, decline in clear thinking, defocusing and decline in memory of trivial matters can be reduced and the quality of life of people having these symptoms can be improved. Provided is an agent for improving attention and concentration powers. An agent for improving attention and concentration powers which contains citrulline or a salt thereof as the active ingredient can be provided. |
