Perhaps it would be a good idea if you went the Natural route before you ,get to the testing stage.Experts agree that all children and especially those with concentrating and learning difficulties benefit from a multiple vitamin-mineral supplement with B Complex and Vit C also Fish oil has shown benefits.Other useful supplements to consider are the essential amino acids that support Brain function.Since protein rich foods, eggs, Fish ,Lamb ,chicken ,Tofu , support allertness and concentration they make a good selection for breakfast and lunch, leave the more relaxing Carbs to the evening meal ie Fruits and Veg.it is helpful to avoid the common allergenic foods like Dairy and wheat.I know it is not easy to make the right descision for your child and you are doing your best, read the threads and Posts here for some more feedback and put it into your search engine .