my neurologist was saying that brain fog can be caused by signal speed being too slow or too fast, mine are too slow I think after low oxygen sleep apnea, hypoxia. on DTI MRI the brain gets white tangles from sleep apnea I still have short term memory and learning problems. would it be good to first try magnesium or citicoline before Neurontin/Gabapentin? Glutamine might increase glutamate which may cause brain fog though maybe it can help the gut lining. http://www.magneceutical.com/ does the methyl b12 protocol really help more than plain b complex?