After three years of crippling insomina and trying every remedy under the sun (supplements and drugs) I finally found relief with a combination of taurine and theanine. I'm still not a champion sleeper with actual energy, but I don't feel like I'm dying everyday. I am able to fall asleep fairly promptly, and now when I wake up in the middle of the night I actually return to solid sleep and not fragmented. I still could use more sleep in the morning if if it weren't for having to go to work, but I can actually catch successful naps at lunchtime now too, just from the one dose at night time. The one catch is after about a month I was having insomnia again for a week and I had to increase the theanine dose from 100mg at night to 200mg, and it did work. Which is the recommended dose anyway, but I hope I don't have to keep increasing. But at least I know for a fact the theanine is helping. I've never taken the taurine on its own (500mg), so I'm not being a good scientist, can't say for certainty that helps, but other have recommeded this combo, and it's working for me.