Small amounts of it may help with some ADHD symptoms in children, studies have shown. But the side effects of caffeine may outweigh any potential benefit. Most experts recommend that people eat or drink less caffeine or avoid it altogether.
SOURCES: WebMD ADHD Guide: "Topic Overview." WebMD ADHD Medications and Treatments Blog, Richard Sogn, MD: "ADHD Natural Supplements and Nutrition" and "Food Coloring and Additives." Feingold Association of the United States: "Many learning and behavior problems begin in your grocery cart!" McCann, D. Lancet, Nov. 3, 2007. Schonwald, A. AAP Grand Rounds, February 2008.
USDA MyPyramid.gov: "What are discretionary calories?"