Complementary Therapies in Medicine, 53 (2020)
This paper is a meta-analysis of seven studies considering sugar consumption and ADHD. The authors concluded there is a “positive relationship between overall sugar and sugar-sweetened beverages consumption and symptoms of ADHD.”
The authors also discussed the possible roles of zinc and iron deficiency, omega-3 supplementation, and the increased consumption of artificial food dyes, preservatives, and caffeine. They hope for future controlled studies to consider the effects of sugar separately from such other items in the diet.