Zinc is important for bone health, wound healing, and the immune system. It also aids in the proper function of the neurotransmitters in the brain, especially the hormones that are responsible for triggering a calm and happy mood. A deficiency in this mineral has been tied to impulsivity and hyperactivity that’s characteristic of people with ADHD. A study published in the journal BMC Psychiatry showed that ADHD patients who had zinc supplements for six weeks (55mg per day) presented improved mood, positive thinking, and better disposition. They also had fewer episodes of nausea and vomiting. Experts said that zinc helped in increasing their dopamine levels, so taking supplements has been one of the most viable treatments for managing ADHD.