Did you know that L-theanine, an amino acid that is contained naturally in green tea, not only helps maintain a calm alertness during the day but also appears to promotes a deeper sleep at night? The down side is that green tea doesn't contain a high enough concentration of L-theanine to provide these effects. Suntheanine, which is pure L-theanine, and delta-E (available from IMPaXworld.com) may be better choices. And then there is melatonin, a hormone that controls sleep. No surprise, it can help to induce sleep. Interestingly enough, studies have shown that lower doses of melatonin are more effective than higher doses. Some recommend taking 0.3 to 0.5 milligrams three-to four hours before going to bed. It’s different strokes for different strokes. Experiment until you discover what works best for your brain.