This is from a post about serotonin levels/autism. "Interesting read. One thing I noticed with my little boy is that eating bananas induces an almost trance-like state, where he mumbles incoherently and seems just completely out of it. We have since tried to keep him completely away from bananas. So I read more about bananas on the net, and found out they have a high amount of serotonin, which is mentioned as being elevated in some people with autism in this article." Another post: "Actually I think Prozac increases the serotonin in the brain. Bananas contain tryptophan, which is on the serotonin pathway. I think tryptophan +B3 co-factor = serotonin." Some parents reported that giving the child Prozac helped, while others said that the child became highly agitated. I guess its on a case by case basis.