There is no cure to stuttering ... thats a truth However professional speech language therapists do teach about the certain exercises a person has to do regularly It helps manage stutter alot .... not 100% cure but definitly person can improve 70% atleast if they practice regularly atleast 30 mints .... Every exercise doesnt work for all maybe but i believe slow speaking wid stretching vowels is still the most effective and popular i think Long story short : go to proper speech therapist ... shud check if they are ASHA certified or not