I’ve been taking 150mg per day. I swear it’s working for me too— I’ve been more fluent since I started taking it than I’ve been before. I hope this keeps up and I hope I’m not just imagining shit only bc I was hopeful B1 would help me lol. Oh, and in addition to that I started practicing diaphragmatic breathing while speaking yesterday. Hoping that using it over time will help my fluency too!