This deep but brief review by Camille F. J. Lieners PhD, Luxembourg, regarding the IgG controversy [Evomed Diagnostics] helps answer many questions about food testing.
Prevalence missing: Using the same, outdated DSM-4 [Diagnostic Statistical Manual] criteria, with even more disturbing diagnostic limitations for ADHD recognition encouraged by DSM-5, the problem is global.
One of the many reasons so many deny ADHD as a biologically valid medical entity is the simple observation that too often the ADHD stimulant meds simply don't work predictably.