Magnesium, Iron, and Zinc Supplementation for the Treatment of Attention Deficit Hyperactivity Disorder: A Systematic Review on the Recent Literature

"Findings of these studies using zinc supplementation in ADHD are mostly positive."
Mitra Hariri, Leila Azadbakht
Int J Prev Med. 2015; 6: 83. Published online 2015 Sep 2. doi: 10.4103/2008-7802.164313