The answer is “it depends” because each person stuttering pattern is unique and tied to their brain. What works for some people doesn’t work for others, because stuttering is not some flu or infection to be cured. If your stuttering is tied to something like PTSD it can be eased by therapy, speech therapy, some meds etc. If your stutter is a result of something like concussion or some kind of toxine, the treatment process would be different. There are probably hundreds of reasons for stuttering, from anxiety to physical brain damage, you can’t cure them all equally.