Follow-Up: My brother suffers from this also... I went to www.altavista.com and typed "bruxism and (calcium or magnesium)" I got a bunch of stuff including this article: http://www.mindspring.com/~turf/alt/reg/maladies/bruxism.txt I had read in a Yoga magazine that if you take 1000mg of Calcium and 1000mg of Magnesium before going to sleep it helps to relax the jaw. I also found this one which I though was VERY funny! But the again... what if it works? http://www.bruxcare.com/patient.htm Good Luck to all of you!