Onion knight, yes 5-HTP is a natural serotonin effector, use thy ER type for the most benefit. It also stabilizes your appetite as well as your mood. You feel human again.
It does not work for everyone but works for most of us, has no or few side effects. I use the Natrol brand from vitacost.com.
I have been using it on advice from my kinesiologist for years. I still have other depression and anxiety issues, but I still have the will to live and fight for whole ness.