Follow-Up: Seems to me we should be looking for the cause, not the symptomatic relief alone. My 5 year old daughter grinds badly - think it is middle child stress. Check out http://vitawise.com/Nutritional_Healing/Bruxism.htm I have not implemented this yet but will report back on the results. We can hear her from the other end of a big house and fear for the state of her little teeth. Please contact me if anyone has alternative ideas which do not include mouth guards - sounds dreadful and must interfere with your sleep every bit as much, even if it does save your teeth a bit.