Noted authors and researchers, Mildred S. Seelig, MD and Andrea Rosanoff, Ph.D. explain ???Calcium is an important essential nutrient, but it must be guarded and controlled, and balanced by adequate magnesium if it is not to cause damage to the cells and the body as a whole.??? For these exact reasons excess calcium can become a real problem, while excess magnesium, on the other hand, is not such