Bests & Worsts Reviews from Amazon

The fact that GABA does not cross the blood- brain barrier does not stop it from effecting the enteric nervous system in the gut, where 90% of serotonin receptors are located, which is why many people with gut problems and depression/ anxiety find it so helpful. There is fascinating new research on the enteric nervous system that some people, who are railing against GABA and saying it should have no effect because of the blood- brain barrier issue, need to catch up on.