Steve Gibson of grc.com has used a portable EEG monitor to diagnose his sleep disorder, and he has tested a variety of natural supplements to give a better night's sleep. His webpage tells us details of his Healthy Sleep Formula. All the ingredients are natural body products except for theanine which is one of the active ingredients in green tea.
And here is an interesting article about an amino acid taurine and life extension. Steve will evaluate taurine to see whether it aids in getting a good night's sleep.