Hideki Matsubayashi,Kenji Yamamoto,Hiroshi Watanabe,Lee Kian Hong
申请号：
US13516488
公开号：
US20120283270A1
申请日:
2010.02.26
申请国别(地区):
US
年份:
2012
代理人:
摘要：
The present invention aims to provide extracts or beverages containing 2,5-piperazinedione,3,6-bis(phenylmethyl)-,(3S,6S)—, which is a useful substance with an improving effect on learning motivation, in an easy-to-ingest form and at a high concentration. Extracts or beverages whose ratio between the content of 2,5-piperazinedione,3,6-bis(phenyl-methyl)-,(3S,6S)— (unit: μg/100 g) and Brix(Bx) is 6 (μg/100 g)/Bx or more can be ingested continuously over a long period of time as foods and beverages useful for improvement of learning motivation.
