 Dietary modifications may be of benefit to some children with ADHD . A 2013 meta @-@ analysis found less than a third of children with ADHD see some improvement in symptoms with free fatty acid supplementation or decreased eating of artificial food coloring . These benefits may be limited to children with food sensitivities or those who are simultaneously being treated with ADHD medications . This review also found that evidence does not support removing other foods from the diet to treat ADHD . A 2014 review found that an elimination diet results in a small overall benefit . A 2016 review did not support a clear link between celiac disease and ADHD , and stated that routine screening for celiac disease in people with ADHD and the use of a gluten @-@ free diet as standard ADHD treatment are discouraged . Iron , magnesium and iodine may also have an effect on ADHD symptoms . There is a small amount of evidence that lower tissue zinc levels may be associated with ADHD . In the absence of a demonstrated zinc deficiency ( which is rare outside of developing countries ) , zinc supplementation is not recommended as treatment for ADHD . There is evidence of a modest benefit of omega 3 fatty acid supplementation , but it is not recommended in place of traditional medication . 
