Is anyone using l-theanine, an amino acid from green tea? If so it is crucial that the correct form is used. Several supplements contain the d as well as the l form and are not as effective. The patented form from Japan, called Suntheanine, is the one which has been used in all of the controlled studies and is used in Japan as a recognized treatment for ADHD. It is now available in capsule form in the US. The latest studies postulate that theanine modulates the levels of neurotransmitters, ie - if one's dopamine levels are too high, theanine lowers it. If one's serotonin levels are too low - it raises it. It also promotes alpha brain waves - the waves we have when we are calm, yet alert. Improvements are seen in concentration, learning, behavior, mood, irritability, etc. within 30 minutes of ingesting it. The following stores sell the Jananese Suntheanine under their label - Vitamin Shop, GNC, and several others on the web. The amount to get a theraputic effect for ADHD is 100 to 200 mg. taken two or three times a day - Also, anyone using Omega 3 fatty acids - EPA, DHA, and the good Omega 6 - GLA? Oftentimes, ADHD is caused by a defiency in the omega's.