I’ve tried it, I wouldn’t say it was a instant cure but it did help jump start my mental health in a healthy direction, that I believe has helped my speech. (I believe my stuttering has a root in self confidence issues) I did just like he said in the video, closed my eyes and told myself to stop stuttering for hours. This was a couple months ago and I still stutter to this day but not near to the level I was at before. I started exercising every day before work and reading 10 pages out loud before I go to work too. I have found chewing gum has helped as well. My speech has improved greatly and my self confidence is higher than ever. I don’t think it was the mushrooms that helped me with my speech but I 100% believe they helped me take the first step towards finding my root cause. Hope this helps!