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 .
Association between Blood Omega-3 Index and Cognition in Typically Developing Dutch Adolescents
The impact of omega-3 long-chain polyunsaturated fatty acids ( LCPUFAs ) on cognition is heavily debated . In the current study , the possible association between omega-3 LCPUFAs in blood and cognitive performance of 266 typically developing adolescents aged 13–15 years is investigated . Baseline data from Food2Learn , a double-blind and r and omized placebo controlled krill oil supplementation trial in typically developing adolescents , were used for the current study . The Omega-3 Index was determined with blood from a finger prick . At baseline , participants finished a neuropsychological test battery consisting of the Letter Digit Substitution Test ( LDST ) , D2 test of attention , Digit Span Forward and Backward , Concept Shifting Test and Stroop test . Data were analyzed with multiple regression analyses with correction for covariates . The average Omega-3 Index was 3.83 % ( SD 0.60 ) . Regression analyses between the Omega-3 Index and the outcome parameters revealed significant associations with scores on two of the nine parameters . The association between the Omega-3 Index and both scores on the LDST ( β = 0.136 and p = 0.039 ) , and the number of errors of omission on the D2 ( β = −0.053 and p = 0.007 ) . This is a possible indication for a higher information processing speed and less impulsivity in those with a higher Omega-3 Index
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 .