Fig. 4

Dose–response meta-analyses for the association between n-3 polyunsaturated fatty acids (PUFA) and the executive function. a Duration of intervention; b daily intake of n-3 PUFA; c total amount of n-3 PUFA taken during the study period; d daily intake of docosahexaenoic acid (DHA); e daily intake of eicosapentaenoic acid (EPA); f ratio of DHA to EPA taken