A daily dose of the omega-3s DHA and EPA may improve attention in kids with and without attention deficit/hyperactivity disorder , says a new study from Unilever. Sixteen weeks of consuming 650 mg per day of EPA and DHA in the form of a margarine were associated with improvements in parent-rated attention, report researchers from the University Medical Center Utrecht , Dr von Hauner Children's Hospital , and Unilever Research & Development.