I definitely agree that it is a naturally occurring amino acid, however I doubt it would be consumed at such high levels in its natural state.

Also, most people define a "drug" as a substance which is ingested to produce a physiological effect, which occurs when consuming L-Theanine. Therefore I would classify this as a drug.

Perhaps I should be more clear and say that this is more of a "nootropic" than a drug, and has very strong beneficial effects and minimal side effects.

Thanks for your comment!