Please check out Redditor https://www.reddit.com/u/Little_Acanthaceae87/s/zkC8vEudKr He is a stutterer/researcher with creds. Stuttering is both physical and physiological. Everything we do to be healthier helps us but its more complex. This disorder is very complex. I'm a 77f who has dealt with this since the age of 5. https://www.reddit.com/u/Little_Acanthaceaeit is the most credible poster. Sue