In your brain imagine lots of Tree Branches with plenty of leaves. When you intake excitotoxins these branches are shaken to death and you loose most if not all of the leaves in large amounts. These leaves are your memory, thinking ability etc. If you do have leaky gut it is important to use L-Glutamine because Leaky Gut is quite a serious problem. But remember my friend you need to fast, eat damn correctly and take Slippery Elm Gruel, Marshmellow and your Glutamine and get this damn problem sorted quickly or else you'll be on this l-Glutamine for too long. Also I would rather take Urine and get my Glutamine NATURALLY!