Sorry to keep reverting to this topic, but it is the only way to try to draw it to research groups attention.
This reference says that opening of the BBB is causing neurological diseases. This is an interview with the respected Dr Blaylock, concerning the use of MSG in foods.

http://treeoflifent.wordpress.com/20...ou-are-eating/

"What they’ve shown is that there are glutamate receptors on both sides of the blood brain barrier and that when you expose these receptors to glutamate, it opens up the blood brain barrier. So, the glutamate itself can open the barrier, and I list all these conditions. For instance, as you get older, your barrier becomes less competent. Almost all Alzheimer’s patients have incompetent barriers. Heat stroke, seizures, autoimmune disorder and multiple sclerosis all are related with this active blood brain barrier."
Ron