Some people think ADHD symptoms happen or get worse because of a lack of something in their diets. But the jury is still out on whether any dietary supplements can affect ADHD symptoms.
Some studies, though, suggest that children with ADHD might not have enough iron. One theory is that supplementing with iron may improve symptoms of the disorder, but that hasn’t been proven.
Fish Oil for ADHD
There is some evidence that fish oil can help improve ADHD symptoms. It contains omega-3 fatty acids. Some findings suggest that fish oil supplements may improve the mental skills of children with the disorder who are 8 to 12 years old.
A specific supplement of fish oil and evening primrose oil was used in one study. The results showed improvements with hyperactivity, inattentiveness, ability to think clearly, and overall behavior in children with ADHD who were 7 to 12 years old.
Deficiencies of particular vitamins or minerals — such as zinc, iron, magnesium, and vitamin B6 — have been documented in children with ADHD. But the results of trials testing whether supplementation with vitamins or minerals alleviates ADHD syndrome have been inconsistent.
Although vitamin or mineral supplements may help children diagnosed with particular deficiencies, there is no evidence that they are helpful for all children with ADHD. Furthermore, megadoses of vitamins, which can be toxic, must be avoided.