Quote:
Originally Posted by Brennan068
Yes, it can cross the blood/brain barrier. No, it is not supposed to. Nobody has really researched it in depth, but it seems to be stress related - if you're under a lot of stress it can. There is some evidence that Gulf War Syndrome is related to this.
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From what I've read, very little of it does. There was a study done several years ago showing that we have less acytocholine in the brain and one of the conclusions was that a trial should be conducted using a drug that does cross the blood/brain barrier, but I couldn't find whether the follow up study was ever run.