Anxiety is definitely related to magnesium, which is, of course, related to calcium. Calcium and magnesium are natural calmers. They keep us human and make us what we are. Taking magnesium with calcium helps because the calcium is less of an antagonist on magnesium reserves and the body is more likely to accept it. If you look in any old medical book, before psychiatry took hold of our society, and you look under "magnesium deficiency" you will see the symptoms of "depression" and "anxiety".