Dr. Lake, could you comment on the sources of this supplement? Although it is "found in tea," apparently it is not derived from tea. I contacted customer service for Bulk Naturals, who said theirs is derived from corn. Another brand, SunTheanine, states theirs "is produced via a patented process that mimics the natural process in green tea leaves," whatever that might mean. Other companies don't say, but presumably theirs is a synthetic also.

I have tried supplementation with L-theanine from a reputable company, Source Naturals, for two months and it didn't seem to have any effect.

I prefer to simply drink white tea (for its low caffeine), which has about 6mg a cup -- a therapeutic dose would be a lot of tea!

Thoughts, suggestions? Thanks.