One of the easiest research papers I did in uni was for my Psychology 101 about using St Johns Wort for depression. It was describable in Germany ATT with dece

One of the easiest research papers I did in uni was for my Psychology 101 about using St Johns Wort for depression. It was describable in Germany ATT with decent success rate for mild-moderate depression. I wonder why it doesn't get prescribed / officially recommended here in USA?