I did the GABA Challenge that you recommended and I felt a little tired. I believe that permeability of the blood/brain barrier is a definite possibility in my case. I understand that this must be corrected. What should I do now? Would a practitioner know how to correct this problem? Can you yourself work with patients long distance on this type of problem? I'm not sure where to turn for the help with this. Your advice would be greatly appreciated, Dr. Jeff.