Effects of Panax Ginseng—containing Tea on Cognitive Performance in Adolescence― A Randomized, Double—blinded, Placebo—controlled Parallel Comparison Trial―

Objectives The purpose of this present study was to investigated effect of ginseng-containing tea intake on cognitive performance.（ UMIN000034367） Methods Subjects was 40 volunteers, aged between 13 and 18 years, were randomly allocated to either the placebo group, in which subjects consumed placebo tea, or the ginseng group, in which subjects consumed the ginseng-containing tea. The cognitive performances measured by Benton Visual Retention Test（BVRT）, Uchida︱Kraepelin psychodiagnostic test （UKT）and TK system Tanaka AB style intelligence test that before and after a 4 week. Results There was a significant interaction over 4 weeks in BVRT score and between the ginseng group and the placebo group. Conclusion These results suggest that Panax ginseng containing tea was beneficial in the visual cognitive performance improvement among adolescence.