To be taken with a strain of nutritional recall data but a new study, children's attention / attention deficit symptoms indicate lower dietary quality but not vice versa: Results from two-way analysis in a population cohort found that the diagnosis of ADHD children in a less healthy diet, while less healthy diet did not lead children to ADHD.
The study was conducted in the Netherlands, followed by 3,680 children who started at the age of 6 and then ended when they reached the age of 10 years.
Simply put, although most of the ADHD symptoms at age 6 were associated with a less healthy diet at the age of 8, the quality of the diet at age 8 was not associated with ADHD symptoms at the age of 10 years.
There are some suggested ways to explain how ADHD can affect the quality of nutrition. ADHD and its impulsivity may increase the risk of excessive eating or control loss and the effect of ADHD on neurotransmitters may affect hunger and completeness. It is also possible that parents of children with ADHD may be offering foods that prefer their children in order to reduce the risk of conflict and / or reward the desired behavior.
Clearly more research on this would be welcome.