A scientific journal article on why an elimination diet should be trialled prior to medicating for ADHD:
Effects of a restricted elimination diet on the behaviour of children with attention-deficit hyperactivity disorder (INCA study): a randomised controlled trial, Lidy M Pelsser, Klaas Frankena, Jan Toorman, Huub F Savelkoul, Anthony E Dubois, Rob Rodrigues Pereira, Ton A Haagen, Nanda N Rommelse, Jan K Buitelaar
The Diet Factor in Attention-Deficit/Hyperactivity Disorder - J. Gordon Millichap and Michelle M. Yee Pediatrics; originally published online January 9, 2012
Effects of food on physical and sleep complaints in children with ADHD: a randomised controlled pilot study - Lidy M. Pelsser & Klaas Frankena & Jan K. Buitelaar & Nanda N. Rommelse European Journal of Paediatrics, 2010.
A randomised controlled trial into the effects of food on ADHD - Lidy M. J. Pelsser MSc, Klaas Frankena MSc, PhD, Jan Toorman MD, Huub F. J. Savelkoul PhD, Rob Rodrigues Pereira MD, Jan K. Buitelaar MD, PhD,European Child & Adolescent Psychiatry January 2009, Volume 18, Issue 1, pp 12-19.
See the Food Intolerance Network for a detailed history of the research conducted on food and ADHD