The evidence for nootropics is definitely not solid (yet). And there is no evidence (afaik) showing nootropics have benefits in stuttering. My experience: I have a stutter and I also have Alpha Brain. I haven’t noticed any difference in stuttering when I am taking alpha brain. Alpha Brain seems to be safe for consumption, so if you want to try it, go ahead. The placebo affect might be enough to make a difference to you. Everyone is different.