Taken together , evidence suggests a positive association between healthy dietary consumption and executive functioning .
A systematic review was conducted to evaluate whether healthier dietary consumption  among children and adolescents impacts executive functioning .
Improved cognitive performance following supplementation with a mixed-grain diet in high school students: a randomized controlled trial.
OBJECTIVE Adolescence is a stage of rapid growth , when rich nutritional supplementation is important . Maintaining optimal cognitive functioning is critical in high school students , who are under considerable academic pressure . The objectives of this study were to identify the effects of a 9-wk r and omly assigned diet of mixed grains versus a regular diet on cognitive performance and on levels of plasma brain-derived neurotrophic factor ( BDNF ) and S100B , a calcium-binding protein produced by astroglial cells , in healthy high school students ( grade s 10 and 11 ) . METHODS In this 9-wk , single-blind , controlled study , subjects were r and omly allocated to either a mixed-grain or a regular diet .  Cognitive assessment s and measurements of plasma BDNF and S100B levels were performed at baseline and after the 9-wk intake of a mixed-grain or regular diet .  Computerized neuropsychological tests and self-rating scales were used for the cognitive assessment s. RESULTS Significant improvements in some neuropsychological tests were found after 9 wk in both the mixed-grain and the regular-diet groups , but the changes from baseline between the two groups were not significantly different . Significant impairments on the AX-continuous performance test were observed at the endpoint in the regular-diet group , and the changes from baseline between the two groups were also significantly different for this test . A significant difference in changes in BDNF levels was observed between the two groups . CONCLUSIONS These results suggest that intake of mixed grains for 9 wk is beneficial for cognitive performance and plasma BDNF levels in high school students . These beneficial effects seem to be related to the prevention of cognitive deterioration in a mental-fatigue test with the mixed-grain diet , rather than cognitive enhancement per se
Taken together , evidence suggests a positive association between healthy dietary consumption and executive functioning .
A systematic review was conducted to evaluate whether healthier dietary consumption  among children and adolescents impacts executive functioning .