Zinc sulfate as an adjunct to methylphenidate for the treatment of attention deficit hyperactivity disorder in children: A double blind and randomized trial
Nutritional deficiencies are common and do have consequences. In this study, children diagnosed with ADHD, had a significant reduction in symptoms from supplementing with zinc. Among its many essential roles, zinc helps with the production of dopamine in the brain, and deficiencies are thought to play a role in ADHD.
If you want to understand more about the role of diet in ADHD, take a look at this comprehensive meta-analysis of the research. Food intolerances and food allergies are the most researched in ADHD treatment, in terms of the effect of certain foods and food additives on the functioning of our brains and nervous system.
Food additives and hyperactive behaviour in 3-year-old and 8/9-year-old children in the community: a randomised, double-blinded, placebo-controlled trial
100% of 153 3-year-olds showed an adverse effect in hyperactivity after consuming beverages with sodium benzoate and artificial food colour and additives (AFCAs)! All of them. (Sodium benzoate and AFCA are found in sodas, soft drinks, and common fruit flavored drinks and beverages. Read your labels!)