Kava kava is on my shopping list for my next order from BB.com. Im so keen to find out what it does, im really into my fun herbs. I too am a vitamin freak like Icarus falling. I had some great results with 5-htp although chronic use is ill advised as it can cause heart complications if too much 5-ht is broken down inside the liver into serotonin. I find its best used about once every two weeks, the effects are really pronounced when its used like this, I find a tolerance builds to it after a few weeks of use and the effects dont seem so great. But once a week you really get a lovely spaced out calm feeling. The thing I currently use for sleep is valerian root and passion flower, it definitely does the trick. Once a week I use phenibut for the most awesome sleep Ive ever had.
Another good supplement for sleep is taurine. Oh and theanine which is also on my next shopping list. I havent tried melatonin but I know that the sleep you have on 5-htp is based on excess serotonin being broken down into melatonin so I can vouch that the effects are good. Id say if you're suffering from insomnia get a load of valerian root, 5-htp, passion flower, phenibut, kava kava. taurine. Whatever it takes, not sleeping creates a nightmare of a world for me. And the irony of it is the longer Ive gone without it the harder it is to get to sleep at all. In these situations I need to knock myself out.
Be mindful though to do research into what substances you can use chronically. Do not use 5-htp, phenibut or kava kava regularly. 5-htp could potentially be quite harmful, phenibut is addictive and tolerance develops and Ive read somewhere that kava could be hazardous. From what I know passion flower and valerian are pretty safe, as well as taurine and theanine which incidentally is found in large quantities in green tea.