Thats interesting chgirl... I had the same test and my seratonin was low and a couple other ones. My Dr. suggested I try the amino acids. But when I started asking about how the therapy would work she didn't really answer why they were low etc... I might ask again about it and try it though. Your Dr. thought your seratonin was low because of your gut infections? What about the other ones? I'm kind of curious about this stuff...