Few things: Outgrowing a stutter is very common, and by Occam's razer is just a lot more likely than a bunch of different things coalescing to the same result Some things you mentioned are incredibly vague i.e. clearing your mind, and are more likely to be correlation than causation. Your mental health may have been improved just as much by not stuttering as an improved mental health would have cured your stutter And frankly, a lot of the things you mention are very common and generic reduction methods that have very divisive results. My stutter, for instance, is better when I talk faster and worse when I slow down