My 7 year old son has been failsafe for a couple of years now with great results.  My 5 year old daughter has quite a bad stutter and it has just dawned on me that diet may make it worse. I have often noticed that her speech is worse when my son’s behaviour is at its worst. Her speech therapist pointed out that it may be due to diet and that his hyperactivity is the symptom but her symptom is stuttering.  Given that they both generally eat the same thing this makes sense.  I tend to be more lax with her diet though.