Trying to separate three different claims about L-theanine: that it is the right molecule, that it is the right dose, and that it does something useful.
There is a serious question about whether the studied form matches what is sold, and nobody in a thread can answer it.
If you need three other compounds to notice the first one, you have not tested the first one.
Sample size, blinding, and who paid for it. Those three questions kill most of the confidence in most of these threads.
The interesting question is not whether it works but for whom and at what cost.
Narrow conclusion, briefly right. Broad conclusion, interestingly wrong. I know which I keep choosing.
Underdosing and tolerance are indistinguishable from the inside, and everyone picks the flattering explanation.