Trying to separate three different claims about L-tyrosine: that it is the right molecule, that it is the right dose, and that it does something useful.

Sample size, blinding, and who paid for it. Those three questions kill most of the confidence in most of these threads.

Loose evidence is not the same as no evidence and people overcorrect in both directions.

I would rather have a narrow conclusion and be right than a broad one and be interesting.

Forum consensus and published consensus diverged here about five years ago and never reconverged.

Where does the human data stop and the extrapolation start?